Про 4й бустер

3ю бустерную дозу, получали в августе и далее. А потом пришел омикрон и случаи ковида поползли вверх как на дрожжах, потому встал вопрос об еще одном бустере, чтоб взять не качеством (тк омикрон заметно отличается)- так количеством.
Пока есть мнение, что 4я прививка не особо улучшает защиту от омикрона, по сравнению с 3ей.
Да, антитела становится больше, чем после 3, но не на особо много.
Кроме того, привитые 4 дозами тоже подхватывали омикрон. Хотя и чуть реже, чем те, кто привился менее чем 4 дозами вакцины.
Тем не менее, прививание 4 дозой - продолжается.
На 16 января привили уже полмиллиона.
Дело, вероятнее всего, в том, что штамм уж сильно отличается от "оригинала" , для которого разработана вакцина.
Но такая ситуация, весьма вероятно, случится и в будущем, тк у коронавируса высокий потенциал для штаммобразования (почти свободная циркуляция среди людей, по всему миру, плюс перескакивание к животным, самым разным, и обратно).
JERUSALEM (Reuters) -A fourth shot of COVID-19 vaccine boosts antibodies to even higher levels than the third jab but it is not enough to prevent Omicron infections, according to a preliminary study in Israel. Israel's Sheba Medical Center has given second booster shots in a trial among its staff and is studying the effect of the Pfizer booster in 154 people after two weeks and the Moderna booster in 120 people after one week, said Gili Regev-Yochay, director of the Infectious Diseases Unit. These were compared to a control group that did not receive the fourth shot. Those in the Moderna group had previously received three shots of Pfizer's vaccine, the hospital said. The vaccines led to a increase in the number of antibodies "even a little bit higher than what we had after the third dose", said Regev-Yochay. "Yet, this is probably not enough for the Omicron," she told reporters. "We know by now that the level of antibodies needed to protect and not to got infected from Omicron is probably too high for the vaccine, even if it's a good vaccine." The findings, which the hospital said were the first of its kind in the world, were preliminary and not yet published
.Regev-Yochay said it’s still “likely” a good idea to roll out fourth doses to those who are at the highest risk, the Times of Israel reports, but suggested it may be better to only give older senior citizens the extra shot rather than everyone over age 60, as Israel is doing now. Regev-Yochay did not release more specific data from the trial or comment on the fourth shot’s effectiveness against hospitalization or death against omicron, though the initial booster shots are highly protective against severe illness from the variant.
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