The immune system, age and gender are key factors for the covid vaccine to generate adverse reactions, which may be more frequent after the second puncture, since the gear set in motion in the body with the first dose tends to accelerate .
This was stated by Luis Ignacio Martínez Alcorta, member of the Spanish Association of Vaccination (AEV), in an interview with Efe in which he detailed that the reaction to the vaccine depends on many characteristics, but can be divided into large variables: ” The immune system, which can be more or less conditioned in turn by age or even sex. “
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