Healthy vaccinee effect in SARS-CoV-2 vaccinees without documented infection
Importance: Estimates of SARS-CoV-2 vaccine effectiveness (VE) from observational studies may be biased if healthier (healthy vaccinee effect; HVE) or less healthy individuals are preferentially vaccinated. Quantifying HVE is essential for interpreting VE estimates for informed vaccination policy. Objective: To assess...