Estimates of prevalence range considerably, depending on how researchers define long covid in a given study, but the Centers for Disease Control and Prevention puts it at 17 million adults.

Studies confirm that the known risks of COVID-19 vaccines are very rare and that the benefits outweigh the potential risks.

Covid is commonplace. Some, are laid up with symptoms for days or weeks. A smaller group risks hospitalization or death. Should you get the booster update?

The health impacts of the mandated 16 vaccines (spread over 72 doses, before the age of 18) have never enjoyed close scrutiny.