Persistent RBD-specific antibody responses in the recovered SARS patients. The sequential samples were collected from 19 recovered SARS patients enrolled for a follow-up study. The sera were tested at 1/100 dilution by ELISA with RBD-His protein as a coating antigen or by the viral lysate-based diagnostic kit.
Cao et al. Virology Journal 2010 7:299 doi:10.1186/1743-422X-7-299