estimated vaccine effectiveness (IMAGE) The University of Hong Kong Caption Estimated vaccine effectiveness (VE) and infection attack rate (IAR) over time. (1) VE at zero to 200 days from receipt of last dose. VE is presented separately over time for three or four homologous doses of Comirnaty (BNT) or CoronaVac. (2) IAR over time. (1 & 2) The lines indicate posterior medians and shaded bars indicate 95% credible intervals based on the fitted model. Credit The University of Hong Kong Usage Restrictions N/A License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.