SAO PAULO—Brazil’s death toll from COVID-19 surpassed 500,000 on Saturday as the country relies overwhelmingly on a vaccine developed by China’s Sinovac Biotech, which Singapore’s director of medical services at the Ministry of Health Kenneth Mak said on June 18 presented a significant risk of “vaccine breakthrough.” Mak pointed to international evidence reporting that many who have taken the China-made vaccine later became infected with COVID-19. Brazil has registered 500,800 deaths from 17,883,750 confirmed CCP (Chinese Communist Party) virus, according to Health Ministry data on Saturday, the worst official death toll outside the United States. Over the past week, Brazil has averaged 2,000 deaths per day. “It’s not a problem associated with Pfizer. This is actually a problem associated with the Sinovac vaccine, and in other countries, they are now starting to think about booster vaccinations, even six months out from an original vaccination for some of these vaccines as well,” he said. …