close up view of needle of a vaccine

COVID-19 Vaccines: Are They Safe for Everyone?

George Delgado, MD While the causes are not known, we can assume that some had fever, malaise, muscle aches and diarrhea, known vaccine adverse effects. Perhaps some frail elderly cannot tolerate and push through the vaccine’s side effects the way younger people can. Only 4.3% of the patients in the Pfizer-BioNTech study, that led the…

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