Side effects after Pfizer COVID vaccine more common after COVID-19Patients with a history of COVID-19 were more likely to have side effects after their first dose of the Pfizer/BioNTech COVID-19 vaccine than those who were never infected, according to a Vaccine study yesterday.The researchers conducted a prospective observational study consisting of 311 healthcare workers from a university tertiary care hospital in France.
From Jan 27 to Feb 5, they self-reported demographics and symptoms 21 to 28 days after their first vaccination and before their second.The mean age was 55.4 years, and 60% of respondents were women.