China Promotes Vaccine Worldwide, But Critics Say Low Efficacy

Sinovac and Sinopharm companies are the leading vaccine manufacturers in China . And both vaccines have been approved by the World Health Organization (WHO) to fight COVID-19 . Sinovac is a private company, while Sinopharm is managed by the government. Chinese scientists used the same method to make both vaccines. Dr. Andrea Cox, professor at Johns Hopkins University School of Medicine, said for such vaccines, scientists take a virus or bacteria, inactivate or kill it, and inject it into people. Because the virus is dead, it can't infect anyone. Then, when someone who has been vaccinated is exposed to a…