The Pfizer vaccine would be effective against the South African variant, in young people and over time

The good news is mounting for the Pfizer vaccine. According to recent studies, it would thus be effective against the worrying South African variant, in the youngest, and in the long term. First, therefore, the serum would indeed be as effective on the South African variant as on the original strain. A clinical trial has indeed been carried out in South Africa. 800 participants have been recruited since October, in two different groups. While the first received the Pfizer serum, the second had a placebo. A total of nine cases of Covid-19 were detected, all in the placebo group, indicating 100% vaccine efficacy, although larger-scale studies will be needed to confirm this data.

Still effective six months after the second injection

For Professor Jean-Daniel Lelièvre, head of the immunology department at Henri-Mondor hospital in Créteil, this study is very encouraging. “The immunological data available show that even if there was a drop in neutralizing activity, this drop would be much less significant than with other vaccines and gives hope for an efficacy of this vaccine against the variants”, confides it at Europe 1.

Other good news: the Rolls of anti-Covid vaccines would also remain 91% effective six months after the second injection.

100% effective in teens according to a study

And in a latest study of 2,000 adolescents aged 12 to 15, Pfizer serum packs a punch with 100% effectiveness. These data are particularly interesting because, for the moment, the vaccination of the youngest is not yet envisaged, but it could become it in the coming months to obtain a more important collective immunity.


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