… For estimation of PE S against BA.2.75* (predominantly BA.2.75.2; Section S1) infection, we
exact-matched cases (SARS-CoV-2-positive tests) and controls (SARS-CoV-2-negative tests)
in a one-to-five ratio by sex, 10-year age group, nationality, number of coexisting conditions,
number of vaccine doses at time of the SARS-CoV-2 test, calendar week of testing, method of
testing (PCR or RA), and reason for testing. Matching was done to control for known differences
in the risk of exposure to … Characteristics of matched cases (SARS-CoV-2-positive tests) …