BCR and COVID-19: To learn those insights, we tracked the development of paired heavy and light chain BCR repertoires in longitudinal samples collected from six healthy recipients of inactivated SARS-CoV-2 vaccine (BBIBP-CorV), five people who received the BBIBP-CorV vaccine after having recovered from COVID-19, five unvaccinated COVID-19 recovered people and then integrated with public data of B cells from four SARS-CoV-2 infected patients.