Source: China – South China Morning PostTwo doses of the Sinovac Covid-19 vaccine boosted with one shot of Pfizer will induce higher levels of protective antibodies than two Pfizer doses, but this combination is not sufficient to stop Omicron infection, according to a preprint study.The findings suggest countries that have used the Pfizer vaccine as a booster dose after Sinovac’s CoronaVac, widely used in China and developing countries, may still need to offer a second booster dose, according to one author of the paper, which has not…Read More