4,400 adverse events reported in US after receiving Pfizer-BioNTech vaccine

4,400 adverse events reported in US after receiving Pfizer-BioNTech vaccine Nearly 4,400 adverse events were reported after people received the Pfizer-BioNTech Covid-19 vaccine in the US, with 21 cases determined to be anaphylaxis, according to a report by the Centers for Disease Control and Prevention (CDC). https://ift.tt/eA8V8J