Figure. Timeline of a vaccinated healthcare worker who had positive viral tests for SARS-CoV-2 infection 24 days apart (December 20, 2021, and January 12, 2022), Pennsylvania, USA. Image shows symptoms and test results for the patient and household members. The patient and his wife were up to date with Pfizer-BioNTech (https://www.pfizer.com) SARS-CoV-2 vaccines (2 doses of primary series and 1 booster dose). Both eligible children (9-year-old and 14-year-old sons) were fully vaccinated against SARS-CoV-2. Ct, cycle threshold; N1, nucleocapsid 1 protein; N2, nucleocapsid 2 protein; PA, Pennsylvania; S, spike protein.