Editorial: SARS-CoV-2 Vaccine Responses and Breakthrough COVID-19

In 2021, data from global disease monitoring and infection surveillance programs have shown that vaccination programs have reduced the incidence of SARS-CoV-2 infection and hospitalization and mortality rates. Currently, the US Centers for Disease Control and Prevention (CDC) identifies a fully vaccinated individual as being ≥14 days after the completion of all the recommended doses of a COVID-19 vaccine that has been authorized by the US Food...