Hamsters develop protective immunity to COVID-19 and are protected by convalescent sera

In an animal model for COVID-19 that shares important features of human disease, scientists show that prior infection with the SARS-CoV-2 virus provides protection against reinfection, and treatment with convalescent serum limits virus replication in their lungs.

source https://www.sciencedaily.com/releases/2020/06/200622172026.htm