Multisystem Inflammatory Syndrome after SARS-CoV-2 Infection and COVID-19 Vaccination

We report 3 patients in California, USA, who experienced multisystem inflammatory syndrome (MIS) after immunization and severe acute respiratory syndrome coronavirus 2 infection. During the same period, 3 adults who were not vaccinated had MIS develop at a time when approximate to 7% of the adult patient population had received >= 1 vaccine.

Automated summary

This report discusses 3 cases of patients in California who experienced multisystem inflammatory syndrome (MIS) after receiving vaccination and being infected with SARS-CoV-2. It also mentions 3 cases of adults who were not vaccinated developing MIS during a period when around 7% of the adult population had received at least one vaccine.