That’s the big problem of the current vaccines: every year, medical experts guess what’s going to be the dominant flu strain and create a vaccine using a weakened version of that virus. When it gets injected, our body gets to know the weakened virus safely, producing cells that can neutralize that virus if a real attack occurs. The problem is that, if that virus mutates, this prevention becomes useless. That is why people may get the flu even when they are vaccinated.
Les mer.

ektenyheter