Covid vaccine, protection drops within 6 months

The protection of the covid vaccine has already decreased in the first vaccinated. This is suggested by a study conducted in GB, according to which the double dose of Pfizer / BioNTech and AstraZeneca vaccines begins its decline within 6 months. In detail, the researchers observed that the Pfizer vaccine was 88% effective in preventing infection one month after the second dose. But after 5 or 6 months the protection dropped to 74%. There would therefore have been a drop of 14 percentage points in 4 months. With the AstraZeneca vaccine, the protection against infection was 77% one month after the second dose. After 4 or 5 months it dropped to 67%, with a drop of 10 percentage points in 3 months. Read also The study was based on the data of 1.2 million users of the Zoe Covid App, which on 11 December 2020, to allow the registration of vaccines and monitor side effects and efficacy in the real world, launched a new function . Behind this App and its commitment to the Covid front is a non-profit initiative, created in collaboration with King’s College London and funded by the Department of Health and Social Care. The study compared self-reported infections in the vaccinated group of participants and cases in an unvaccinated control group. We used data from vaccines recorded from December 8, 2020 to July 3, 2021 and from infections that occurred between May 26, 2021, when the Delta variant became dominant, and July 31. While protection appears to be steadily decreasing, individual risk can vary due to individual variation in antibody lifespan, say the researchers. According to the study, health professionals and the elderly who were first vaccinated may now be at greater risk of Covid than those who were most recently vaccinated. “A reasonable worst-case scenario could see less than 50 percent protection for the elderly and healthcare workers by winter,” warns Tim Spector, chief scientist of the Zoe Covid Study app. United Kingdom, “driven by loosened social restrictions and a highly transmissible variant, this scenario could mean an increase in hospitalizations and deaths – continues Spector – We urgently need to make plans for the vaccine booster”, the third dose, “and , based on resources, decide whether the strategy of vaccinating children makes sense if our goal is to reduce deaths and hospitalizations. “” A decrease in protection is to be expected and it is not a reason not to get vaccinated – points out the expert – Vaccines still provide high levels of protection for the majority of the population, especially against the Delta variant, so we still need as many people as possible to see accinino completely “.