Breakthrough Infections with SARS-CoV-2 in Vaccinated Students After a Festive Event – Identification of Risk Factors

We report an outbreak with SARS-CoV-2 breakthrough infections related to a festive event in Northern Bavaria, Germany in October 2021, with 24 of 95 participants infected. Correlation analyses among 15 interrogated variables revealed that duration at the event and conversation with the supposed index person were significant risk factors. Article Summary Line The risk of infection with SARS-CoV-2 in a vaccinated cohort associated with a private festive event was significantly increased upon conversation with the putative index person and positively correlated to the duration of stay at the event.