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Sinovac Biotech vaccines are displayed at a press conference during a media tour of a new factory built to produce COVID-19 vaccines, in Beijing on Sept. 24, 2020. Wang Zhao/AFP via Getty Images
Chinese-made COVID-19 vaccines have come under scrutiny after regulators approved the first one for general use on Dec. 31 last year. Several Chinese pharmaceutical companies are still conducting clinical trials for their products.
A contraindication is a symptom or condition that makes treatment risky and potentially inadvisable.
Frank Yue is a Canada-based journalist for The Epoch Times who covers China-related news. He also holds an M.A. in English language and literature from Tianjin Foreign Studies University, China.