On Thursday, China’s powerful 25-member Politburo led by President Xi Jinping ordered an official probe into the country’s former top food-and-drug regulator, Wu Zhen.
He also called for the resignations of the mayor of the northeastern city of Changchun, and deputy director of the State Market Regulatory Administration in Beijing.
President Xi Jinping said he was “shocked” by the news and demanded action against those involved.
Shares of Changchun-based Changsheng Bio-Technology have been sliding on a daily basis since the vaccine scandal broke out, sending the company’s stock down 80 percent.
Health-care companies on the Shanghai Shenzhen CSI 300 index have lost more than two percent in Friday trading, Xinhua wrote.