The new data of the efficacy study of the vaccine against the coronavirus mutant proves this: “The protection rate against the infection of the B.1.1.7 strain is 29.5%, while the protection rate for the complete vaccination cycle is 89.5%.”
Although Italy has expanded the recall of Pfizer-BioNTech anti-Covid vaccine 21 to 42 daysA new study warns that First dose. The serum has been registered and authorized for the first time since the age of 16, and has been proven to have high efficacy, even for the most popular variants, only after two doses.The new estimates have been posted on New England Journal of MedicineIn detail, the protection given by a single dose is significantly lower than that guaranteed by a complete vaccination cycle.
The efficacy of Pfizer vaccine
The study conducted by the Qatar Covid-19 Vaccination National Research Group evaluated the impact of the vaccination campaign on more than 200,000 people immunized between February 1, 2021 and March 31, 2021.Virus sequencing data showed that the rapid expansion of Arab countries in Arab countries triggered the second and third pandemics, which showed that as of March 18, 44.5% of new infections were caused by English variant (B.1.1.7) Half comes from the South African variety (B.1.351). This situation is partly similar to the situation in Italy, where the variant version of the coronavirus, especially the variant version in English, dominates. Almost whole B.1.1.7 The occurrence of new cases of Covid-19 caused by lineage.
Analysis of Qatar researchers showed that the first dose of Pfizer-BioNTech vaccine almost protects Three times less than the English version Rather than the recommended two-dose course of treatment. “Estimated efficacy of the vaccine against any form of infection caused by variant B.1.1.7 -Said scholar- At least two weeks after taking the second time to reach 89.5%. on the other hand, The efficacy of a single dose is 29%. Similarly, after two doses of vaccination, the protection rate against any form of infection caused by the South African variant was 75%, while a single dose was only 16.9%.
The results are also reflected in the protection against the severe form of Covid-19, the efficacy of a single use of the English variant B.1.1.7 for serious diseases caused by halved (54% after two uses and 100% after two uses) ) )Yes Even zero Compared with the disease caused by the South African variant B.1.351 (0% and 100% after two administrations).
In any case, data related to the complete vaccination cycle, especially data related to preventing the severe form of Covid caused by the South African variant, can be guaranteed. “Variant B.1.351 has reduced protection against infection- Conclusion scholars -It does not seem to have translated into inadequate protection against the most severe form of Covid-19 (that is, the form that leads to hospitalization or death), which is strong and exceeds 90%”.