The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Do you qualify? The Pfizer-BioNTech COVID-19 vaccine is 'weaker' against the Indian 'Delta' variant and provides 'significantly less' protection than health officials had hoped, a new report from Israel claims . The Delta Plus variant is also evoking interest and concerns in India. A new study shows two doses of the Pfizer vaccine appears to offer high protection against combating the delta variant. Moderna also announced Tuesday that a new study showed its vaccine also produced promising protection in a lab setting against the Delta variant and others currently circulating. Two doses of the Pfizer COVID-19 vaccine are 88 percent effective against the delta variant, according to a new study. Refi Rates at 2.03% APR. Pfizer's shot is effective at preventing symptomatic disease from the now-dominant variant, according to a study published in the New England Journal of Medicine. The study published in the New England Journal of Medicine says the Pfizer vaccine is 88% effective against preventing symptomatic disease from the strain. REUTERS/Carlo Allegri JERUSALEM, June 24 (Reuters) - The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a … Pfizer vaccine Delta variant: The newly identified Delta variants of COVID-19, classified as the variants of concern, have emerged as another threat. Study Shows Pfizer Vaccine Highly Effective In Protecting Against Delta Variant. 93%. The antibody response against the delta variant was about two times weaker than against the ancestral strain of the virus. Singapore has been actively pushing for more people to get vaccinated to better protect themselves and the community.. On Wednesday (21 Jul), a study by the New England Journal of Medicine found that the Pfizer-BioNTech vaccine is highly effective, even against the more transmissible Delta variant. A study conducted in Israel found that the Pfizer COVID-19 vaccine is somewhat less effective against the more infectious delta variant, though it was still found to be effective … One recent study showed the Pfizer vaccine was 84% effective against the variant after two doses, but only 34% effective after the first dose. The efficacy of Pfizer’s COVID-19 vaccine has plunged in Israel as the highly contagious Delta variant spreads throughout the country, Israel’s health ministry warned Monday.. A Canadian study that found the Pfizer vaccine to be 87% effective … JERUSALEM (Reuters) -The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Studies initially showed Pfizer's vaccine offered 94 per cent protection after two doses against … By Sally Robertson, B.Sc. Addressing the concern, Pfizer claimed that… There is next to no data on how other COVID-19 vaccines are faring against the delta variant at this stage. Conversely, if the vaccine was less effective against the delta variant than against the alpha variant, then the delta variant would be expected to … There are also a few laboratory studies that suggest the Moderna COVID-19 vaccine is effective against the Delta variant. Meanwhile, the Pfizer/BioNTech vaccine was found to be 96% effective against the Delta variant after two doses. Both the U.K. study and the Israel study found that the Pfizer/BioNTech vaccine was more than 90 percent effective against severe illness caused by the delta variant after two doses. How effective are the vaccines against the new delta variant? The vaccine was 74% effective against symptomatic disease caused by the Alpha variant and 64% effective against the Delta variant. COVID-19 vaccine effectiveness for one dose of the Pfizer/BioNTech or the AstraZeneca/Oxford vaccine against the Delta variant (B1617.2) was much lower compared with one-dose effectiveness against the Alpha variant (B117), according to a UK study yesterday in the New England Journal of Medicine.Two doses, however, narrowed the gap. Separately, preliminary findings of a Scottish study published in The Lancet last month found that the Pfizer vaccine provided 79% protection against all infections from the Delta variant, … DETROIT – The Johnson and Johnson COVID vaccine may not be as effective as vaccines that use mRNA technology (Pfizer and Moderna) against the delta variant, according to a … Study shows efficacy of Pfizer-BioNTech and Moderna vaccines against SARS-CoV-2 delta variant. A study based on real-world data from the U.K. found that two doses of the Pfizer vaccine were 88% effective at preventing COVID-19 as a result of an infection with the Delta variant. Download PDF Copy. The study published in the New England Journal of Medicine says the Pfizer vaccine is 88% effective against preventing symptomatic disease from the strain. Health officials in England said that Pfizer's coronavirus vaccine is effective at protecting against the Delta variant after the second dose. The Pfizer COVID-19 vaccine is only 64% effective against protection from the Delta variant, according to a recent analysis by the Israeli government, but U.S. … The anti-COVID-19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … A UK-based study from May found that two doses of either AstraZeneca or Pfizer's vaccine were highly effective against the Delta variant, from two weeks after the second dose. The vaccine was 74% effective against symptomatic disease caused by the Alpha variant and 64% effective against the Delta variant. The variant was first detected in India. The news echoes other findings that the Moderna and Pfizer vaccines … This isn't … A new study shows two doses of the Pfizer vaccine appears to offer high protection against combating the delta variant. Meanwhile, in Israel, the health ministry released preliminary, unpublished information on July 5 suggesting that with the rise of the delta variant in the nation, the Pfizer/BioNTech vaccine was now 64% effective against infection or symptomatic illness, but still 93% effective in preventing serious illness and hospitalization. The medical company shared the data online Wednesday (July 28) and is expected to discuss the study further during a company earnings call later in the day. The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Two doses of Pfizer (PFE.N) or AstraZeneca's (AZN.L) COVID-19 vaccine are nearly as effective against the highly transmissible Delta coronavirus variant as they are against … Pfizer’s coronavirus vaccines provide surprisingly robust protection against the highly infectious Delta variant of COVID-19 — but only if vaccinated of both doses. A study based on real-world data from the U.K. found that two doses of the Pfizer vaccine were 88% effective at preventing COVID-19 as a result of an infection with the Delta variant. Pfizer Vaccine Is 88% Effective Against Delta COVID Variant, U.K. Study Finds . People who have received both doses of Pfizer’s COVID-19 vaccine are 88 percent protected against getting sick from the highly infectious Delta variant — … The new study from Israel’s Health Ministry found the overall effectiveness to prevent the Delta variant … Pfizer Vaccine Protection Declines After Six Months, Boosters Protect Against Delta Variant The study found the vaccine’s efficacy declined an … The Pfizer vaccine was reportedly 88 percent effective in preventing COVID-19 symptoms from the delta variant two weeks after the second dose of the vaccine. That’s how effective the Pfizer vaccine is at preventing serious illness and hospitalization caused by the Delta variant after two doses, according to the Israeli study. The medical chief at Pfizer Israel on Thursday said the company's vaccine against coronavirus is effective against the Delta variant, which originated in India. Pfizer's coronavirus vaccine provides surprisingly robust protection against the highly infectious Delta variant of COVID-19-- but only if you've gotten both doses.. Fresh data out of England shows that two doses of the messenger RNA (mRNA) vaccine is 88% effective in protecting people against the Delta variant, compared with about 94% effectiveness against the original strain of COVID. The data also showed that a single dose of the Pfizer/BioNTech vaccine was 94% effective at preventing hospitalisation, while AZ’s jab was 71% effective after the first dose. Researchers in England studied how effective the two-dose AstraZeneca and Pfizer-BioNTech vaccines were against it, compared with the alpha variant that was first detected in the U.K. Real-world data from Israel appears to indicate that the Pfizer-BioNTech vaccine is significantly less effective against the Delta variant. Aug … Meanwhile, the Pfizer/BioNTech vaccine was found to be 96% effective against the Delta variant after two doses. Both the AstraZeneca and Pfizer-BioNTech COVID-19 vaccines maintained effectiveness against the Delta variant in … After a study in England found the Pfizer/BioNTech Coronavirus vaccine to be 88% effective against the Delta variant, data from Israel suggests just … Pfizer’s coronavirus vaccines provide surprisingly robust protection against the highly infectious Delta variant of COVID-19 — but only if vaccinated of both doses. The study, published this week in the New England Journal of Medicine, found the Pfizer product to be 88% effective against the delta variant and 93.7% effective against the alpha variant. The AZ vaccine was 92% effective against hospitalisation or death from the Delta variant after two doses. Effectiveness of the Pfizer vaccine dropped from 94% to 64% over the last month in Israel, suggesting it is less protective against the Delta variant. Citing the Delta Variant, Pfizer Will Pursue Booster Shots and a New Vaccine. The anti-Covid 19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … Double dose of Pfizer vaccine is 64% effective against Delta variant, Israel data says. Claim: The delta variant of SARS-CoV-2 is “really is not responsive at all, or protected at all by the vaccines.” Two doses of Covid-19 vaccine, either Pfizer or AstraZeneca, are effective against hospitalization from the Delta variant, according to UK data. The anti-COVID-19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … Both of the vaccines used in South Africa - Pfizer and Johnson & Johnson (J&J) - are effective against the Delta variant, health experts say. “Against the Pfizer vaccine, the antibodies were good at 1,000 (but) with the AstraZeneca vaccine the antibodies dropped right down to 146, indicating that the vaccine would not work so well against the Beta variant. The authors of the new study said a single dose of either the Pfizer-BioNTech or the Oxford-AstraZeneca vaccine was significantly less effective against the delta variant than two doses. Pfizer: After one dose the Pfizer vaccine is 36 per cent effective against symptomatic illness from the Delta variant. Conversely, if the vaccine was less effective against the delta variant than against the alpha variant, then the delta variant would be expected to … WASHINGTON - All three COVID-19 vaccines approved for emergency use by the FDA — Pfizer, Moderna and Johnson & Johnson — are effective against the highly infectious delta variant… Biden touts COVID vaccine progress amid delta variant warning. Another study conducted by Public Health England found that two doses of the Pfizer-BioNTech vaccine demonstrated 88% efficacy against infection by the Delta variant. The researchers found that one shot of Pfizer is only 36 percent effective against symptomatic disease when confronted with this variant. The Pfizer COVID vaccine is 70 percent effective against the new ultra-contagious Delta variant, claims a new study from the Hebrew University, … Read more @ www.timesofisrael.com Tags Big Number. COVID-19 vaccines made by AstraZeneca (AZN.L) and the Pfizer-BioNTech (PFE.N), (22UAy.DE) alliance remain broadly effective against Delta … Pfizer says it's working on a vaccine booster that's effective against delta variant. But when we look at the Delta variant which is now circulating in South Africa, the numbers have gone back up again” he added. Israel has in … ... Dr. Allison Arwady reported Tuesday that a recent study showed the Pfizer vaccine was 84% effective against the variant … The Pfizer COVID-19 vaccine produces lower levels of antibodies against the Delta variant, known as B.1.617.2 and discovered in India, a new study says. According to the study, the Pfizer vaccine is less effective against the Delta variant if people have not gotten their second dose. A small research study, not yet peer … With the BNT162b2 [Pfizer] vaccine, the effectiveness of two doses was 93.7% (95% CI, 91.6 to 95.3) among persons with the alpha variant and 88.0% (95% CI, 85.3 to 90.1) among those with the delta variant. The Pfizer COVID vaccine is 70 percent effective against the new ultra-contagious Delta variant, claims a new study from the Hebrew University, according to Kan. Coronavirus Update Israel says Pfizer vaccine just 64% effective in real world as delta variant continues to spread rapidly Last Updated: July 6, 2021 at … The Pfizer COVID-19 vaccine is only 64% effective against protection from the Delta variant, according to a recent analysis by the Israeli government, but U.S. … COVID-19 vaccine effectiveness for one dose of the Pfizer/BioNTech or the AstraZeneca/Oxford vaccine against the Delta variant (B1617.2) was much lower compared with one-dose effectiveness against the Alpha variant (B117), according to a UK study yesterday in the New England Journal of Medicine.Two doses, however, narrowed the gap. New data released by Pfizer suggests a third dose of its Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the Delta variant compared to the standard two doses initially administered.. Shot of Pfizer is only 36 percent effective against the Delta variant at this stage is! 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And initial evidence shows that the vaccines may be even more effective against the Delta variant than against South Africa's previously dominant strain, the … The two-dose vaccine is the same one that is given to children 12 and up in the United States. HOUSTON - An alarming study finds that Pfizer vaccine is not as effective against the Delta variant. The focus has now, evidently, shifted to the efficacy of vaccines raising concerns about how safe people will be after being vaccinated. The Delta variant has become the predominant strain in England and could become the dominant variant in the United States by the fall. The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Do you qualify? The Pfizer-BioNTech COVID-19 vaccine is 'weaker' against the Indian 'Delta' variant and provides 'significantly less' protection than health officials had hoped, a new report from Israel claims . The Delta Plus variant is also evoking interest and concerns in India. A new study shows two doses of the Pfizer vaccine appears to offer high protection against combating the delta variant. Moderna also announced Tuesday that a new study showed its vaccine also produced promising protection in a lab setting against the Delta variant and others currently circulating. Two doses of the Pfizer COVID-19 vaccine are 88 percent effective against the delta variant, according to a new study. Refi Rates at 2.03% APR. Pfizer's shot is effective at preventing symptomatic disease from the now-dominant variant, according to a study published in the New England Journal of Medicine. The study published in the New England Journal of Medicine says the Pfizer vaccine is 88% effective against preventing symptomatic disease from the strain. REUTERS/Carlo Allegri JERUSALEM, June 24 (Reuters) - The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a … Pfizer vaccine Delta variant: The newly identified Delta variants of COVID-19, classified as the variants of concern, have emerged as another threat. Study Shows Pfizer Vaccine Highly Effective In Protecting Against Delta Variant. 93%. The antibody response against the delta variant was about two times weaker than against the ancestral strain of the virus. Singapore has been actively pushing for more people to get vaccinated to better protect themselves and the community.. On Wednesday (21 Jul), a study by the New England Journal of Medicine found that the Pfizer-BioNTech vaccine is highly effective, even against the more transmissible Delta variant. A study conducted in Israel found that the Pfizer COVID-19 vaccine is somewhat less effective against the more infectious delta variant, though it was still found to be effective … One recent study showed the Pfizer vaccine was 84% effective against the variant after two doses, but only 34% effective after the first dose. The efficacy of Pfizer’s COVID-19 vaccine has plunged in Israel as the highly contagious Delta variant spreads throughout the country, Israel’s health ministry warned Monday.. A Canadian study that found the Pfizer vaccine to be 87% effective … JERUSALEM (Reuters) -The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Studies initially showed Pfizer's vaccine offered 94 per cent protection after two doses against … By Sally Robertson, B.Sc. Addressing the concern, Pfizer claimed that… There is next to no data on how other COVID-19 vaccines are faring against the delta variant at this stage. Conversely, if the vaccine was less effective against the delta variant than against the alpha variant, then the delta variant would be expected to … There are also a few laboratory studies that suggest the Moderna COVID-19 vaccine is effective against the Delta variant. Meanwhile, the Pfizer/BioNTech vaccine was found to be 96% effective against the Delta variant after two doses. Both the U.K. study and the Israel study found that the Pfizer/BioNTech vaccine was more than 90 percent effective against severe illness caused by the delta variant after two doses. How effective are the vaccines against the new delta variant? The vaccine was 74% effective against symptomatic disease caused by the Alpha variant and 64% effective against the Delta variant. COVID-19 vaccine effectiveness for one dose of the Pfizer/BioNTech or the AstraZeneca/Oxford vaccine against the Delta variant (B1617.2) was much lower compared with one-dose effectiveness against the Alpha variant (B117), according to a UK study yesterday in the New England Journal of Medicine.Two doses, however, narrowed the gap. Separately, preliminary findings of a Scottish study published in The Lancet last month found that the Pfizer vaccine provided 79% protection against all infections from the Delta variant, … DETROIT – The Johnson and Johnson COVID vaccine may not be as effective as vaccines that use mRNA technology (Pfizer and Moderna) against the delta variant, according to a … Study shows efficacy of Pfizer-BioNTech and Moderna vaccines against SARS-CoV-2 delta variant. A study based on real-world data from the U.K. found that two doses of the Pfizer vaccine were 88% effective at preventing COVID-19 as a result of an infection with the Delta variant. Download PDF Copy. The study published in the New England Journal of Medicine says the Pfizer vaccine is 88% effective against preventing symptomatic disease from the strain. Health officials in England said that Pfizer's coronavirus vaccine is effective at protecting against the Delta variant after the second dose. The Pfizer COVID-19 vaccine is only 64% effective against protection from the Delta variant, according to a recent analysis by the Israeli government, but U.S. … The anti-COVID-19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … A UK-based study from May found that two doses of either AstraZeneca or Pfizer's vaccine were highly effective against the Delta variant, from two weeks after the second dose. The vaccine was 74% effective against symptomatic disease caused by the Alpha variant and 64% effective against the Delta variant. The variant was first detected in India. The news echoes other findings that the Moderna and Pfizer vaccines … This isn't … A new study shows two doses of the Pfizer vaccine appears to offer high protection against combating the delta variant. Meanwhile, in Israel, the health ministry released preliminary, unpublished information on July 5 suggesting that with the rise of the delta variant in the nation, the Pfizer/BioNTech vaccine was now 64% effective against infection or symptomatic illness, but still 93% effective in preventing serious illness and hospitalization. The medical company shared the data online Wednesday (July 28) and is expected to discuss the study further during a company earnings call later in the day. The Pfizer-BioNTech >PFE.N< vaccine is highly effective against the Delta variant of COVID-19, a Pfizer official in Israel said on Thursday. Two doses of Pfizer (PFE.N) or AstraZeneca's (AZN.L) COVID-19 vaccine are nearly as effective against the highly transmissible Delta coronavirus variant as they are against … Pfizer’s coronavirus vaccines provide surprisingly robust protection against the highly infectious Delta variant of COVID-19 — but only if vaccinated of both doses. A study based on real-world data from the U.K. found that two doses of the Pfizer vaccine were 88% effective at preventing COVID-19 as a result of an infection with the Delta variant. Pfizer Vaccine Is 88% Effective Against Delta COVID Variant, U.K. Study Finds . People who have received both doses of Pfizer’s COVID-19 vaccine are 88 percent protected against getting sick from the highly infectious Delta variant — … The new study from Israel’s Health Ministry found the overall effectiveness to prevent the Delta variant … Pfizer Vaccine Protection Declines After Six Months, Boosters Protect Against Delta Variant The study found the vaccine’s efficacy declined an … The Pfizer vaccine was reportedly 88 percent effective in preventing COVID-19 symptoms from the delta variant two weeks after the second dose of the vaccine. That’s how effective the Pfizer vaccine is at preventing serious illness and hospitalization caused by the Delta variant after two doses, according to the Israeli study. The medical chief at Pfizer Israel on Thursday said the company's vaccine against coronavirus is effective against the Delta variant, which originated in India. Pfizer's coronavirus vaccine provides surprisingly robust protection against the highly infectious Delta variant of COVID-19-- but only if you've gotten both doses.. Fresh data out of England shows that two doses of the messenger RNA (mRNA) vaccine is 88% effective in protecting people against the Delta variant, compared with about 94% effectiveness against the original strain of COVID. The data also showed that a single dose of the Pfizer/BioNTech vaccine was 94% effective at preventing hospitalisation, while AZ’s jab was 71% effective after the first dose. Researchers in England studied how effective the two-dose AstraZeneca and Pfizer-BioNTech vaccines were against it, compared with the alpha variant that was first detected in the U.K. Real-world data from Israel appears to indicate that the Pfizer-BioNTech vaccine is significantly less effective against the Delta variant. Aug … Meanwhile, the Pfizer/BioNTech vaccine was found to be 96% effective against the Delta variant after two doses. Both the AstraZeneca and Pfizer-BioNTech COVID-19 vaccines maintained effectiveness against the Delta variant in … After a study in England found the Pfizer/BioNTech Coronavirus vaccine to be 88% effective against the Delta variant, data from Israel suggests just … Pfizer’s coronavirus vaccines provide surprisingly robust protection against the highly infectious Delta variant of COVID-19 — but only if vaccinated of both doses. The study, published this week in the New England Journal of Medicine, found the Pfizer product to be 88% effective against the delta variant and 93.7% effective against the alpha variant. The AZ vaccine was 92% effective against hospitalisation or death from the Delta variant after two doses. Effectiveness of the Pfizer vaccine dropped from 94% to 64% over the last month in Israel, suggesting it is less protective against the Delta variant. Citing the Delta Variant, Pfizer Will Pursue Booster Shots and a New Vaccine. The anti-Covid 19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … Double dose of Pfizer vaccine is 64% effective against Delta variant, Israel data says. Claim: The delta variant of SARS-CoV-2 is “really is not responsive at all, or protected at all by the vaccines.” Two doses of Covid-19 vaccine, either Pfizer or AstraZeneca, are effective against hospitalization from the Delta variant, according to UK data. The anti-COVID-19 vaccines by US pharma majors Pfizer and Johnson & Johnson (J&J) that are being used in South Africa are more effective against the Delta variant … Both of the vaccines used in South Africa - Pfizer and Johnson & Johnson (J&J) - are effective against the Delta variant, health experts say. “Against the Pfizer vaccine, the antibodies were good at 1,000 (but) with the AstraZeneca vaccine the antibodies dropped right down to 146, indicating that the vaccine would not work so well against the Beta variant. The authors of the new study said a single dose of either the Pfizer-BioNTech or the Oxford-AstraZeneca vaccine was significantly less effective against the delta variant than two doses. Pfizer: After one dose the Pfizer vaccine is 36 per cent effective against symptomatic illness from the Delta variant. Conversely, if the vaccine was less effective against the delta variant than against the alpha variant, then the delta variant would be expected to … WASHINGTON - All three COVID-19 vaccines approved for emergency use by the FDA — Pfizer, Moderna and Johnson & Johnson — are effective against the highly infectious delta variant… Biden touts COVID vaccine progress amid delta variant warning. Another study conducted by Public Health England found that two doses of the Pfizer-BioNTech vaccine demonstrated 88% efficacy against infection by the Delta variant. The researchers found that one shot of Pfizer is only 36 percent effective against symptomatic disease when confronted with this variant. The Pfizer COVID vaccine is 70 percent effective against the new ultra-contagious Delta variant, claims a new study from the Hebrew University, … Read more @ www.timesofisrael.com Tags Big Number. COVID-19 vaccines made by AstraZeneca (AZN.L) and the Pfizer-BioNTech (PFE.N), (22UAy.DE) alliance remain broadly effective against Delta … Pfizer says it's working on a vaccine booster that's effective against delta variant. But when we look at the Delta variant which is now circulating in South Africa, the numbers have gone back up again” he added. Israel has in … ... Dr. Allison Arwady reported Tuesday that a recent study showed the Pfizer vaccine was 84% effective against the variant … The Pfizer COVID-19 vaccine produces lower levels of antibodies against the Delta variant, known as B.1.617.2 and discovered in India, a new study says. According to the study, the Pfizer vaccine is less effective against the Delta variant if people have not gotten their second dose. A small research study, not yet peer … With the BNT162b2 [Pfizer] vaccine, the effectiveness of two doses was 93.7% (95% CI, 91.6 to 95.3) among persons with the alpha variant and 88.0% (95% CI, 85.3 to 90.1) among those with the delta variant. The Pfizer COVID vaccine is 70 percent effective against the new ultra-contagious Delta variant, claims a new study from the Hebrew University, according to Kan. Coronavirus Update Israel says Pfizer vaccine just 64% effective in real world as delta variant continues to spread rapidly Last Updated: July 6, 2021 at … The Pfizer COVID-19 vaccine is only 64% effective against protection from the Delta variant, according to a recent analysis by the Israeli government, but U.S. … COVID-19 vaccine effectiveness for one dose of the Pfizer/BioNTech or the AstraZeneca/Oxford vaccine against the Delta variant (B1617.2) was much lower compared with one-dose effectiveness against the Alpha variant (B117), according to a UK study yesterday in the New England Journal of Medicine.Two doses, however, narrowed the gap. New data released by Pfizer suggests a third dose of its Pfizer/BioNTech COVID-19 vaccine can "strongly" boost protection against the Delta variant compared to the standard two doses initially administered.. Shot of Pfizer is only 36 percent effective against the Delta variant at this stage is! 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