Lack of vaccine side effects no cause for concern: study

Antibodies are not lower in those who did not report systemic symptoms following immunisation with mRNA COVID-19 vaccine, reports a pre-print paper

A lack of side effects following COVID-19 vaccination does not mean it has failed to work, confirms new research.

While a variety of side effects after receiving an mRNA vaccine may be a sign of the immune system kicking into high gear - the opposite is not true, reports a pre-print paper on medRxiv ahead of peer review.

The US researchers tested 206 hospital employees for antibodies against coronavirus before and after receipt of the vaccine from Pfizer and BioNTech and

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