Singaporean health officials have publicly expressed concerns about significant risk reported with vaccines from China following hundreds of Indonesian health workers testing positive for COVID-19 last week despite being fully vaccinated with the Sinovac vaccine. Singapore is the latest country to cast doubt on the vaccine. Dozens of the more than 350 doctors and health workers in Indonesia infected with COVID-19 despite having received the Sinovac vaccine have been hospitalized, it was reported last week, causing further doubt over the vaccine’s efficacy, especially against more infectious variants of the virus. Indonesia has bought and administered China’s vaccine to a large number of its citizens. Singapore’s Ministry of Health’s (MOH) director of medical services Kenneth Mak said at a virtual press conference on June 15 in response to the news from Indonesia that it was evidence of significant risk of “vaccine breakthrough” regarding the Sinovac vaccine “CoronaVac.” Currently, Singapore has only approved Pfizer …