La vaccination reste très efficace contre les formes sévères, même s'i elles sont provoquées par les variants. © gopixa, Adobe Stock

A 4th dose of the Covid-19 vaccine for what? And for whom?

You will also be interested [EN VIDÉO] Are we protected against Covid by having been infected? A coronavirus infection induces an acquired immune response. But for how long is it effective against variants? Judith Mueller is an epidemiologist, professor at the School of Advanced Studies in Public Health (EHESP) and researcher at the Institut Pasteur. …

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