According to The Wall Street Journal, WHO may delay emergency use approval for China's Sinovac vaccine.

The World Health Organization (WHO) is asking China's Sinovac Biotech Ltd (SVA: NASDAQ GS) to provide more data on the manufacturing process and the safety of the COVID-19 vaccine CoronaVac.

One senior WHO official now expects a decision to be delayed into June.

Source: https://www.wsj.com/articles/who-seeks-more-data-on-second-chinese-covid-19-vaccine-up-for-approval-11622019526