CoronaVac is COVID-19 vaccine made by Chinese vaccine maker Sinovac Biotech Ltd. This vaccine contains chemically-inactivated SARS-CoV-2 virus. This vaccine works by using killed viral particles to expose the body’s immune system to the virus without risking a serious disease response. This is similar to rabies vaccine. Recently, Brazil became the first country to complete late-stage trials of CoronaVac.