A Chinese post-doc came to join my group 1 year into the pandemic. He took an antibody test, which should have shown antibodies due to his 2 doses of Sinovax.

A Chinese post-doc came to join my group 1 year into the pandemic. He took an antibody test, which should have shown antibodies due to his 2 doses of Sinovax. Nada. The first thing he after he arrived in the US was to get vaccinated. Perhaps you have evidence that Sinovax works?