About a year ago, genetic sequences from more than 200 virus samples from early cases of Covid-19 in Wuhan disappeared from an online scientific database.
Coronavirus
New York Times: Why more people are getting 2 different coronavirus vaccines

A man receives a dose of Chinese-developed Sinovac Biotech vaccine against the coronavirus disease (COVID-19) in the vaccination center established in the International Exhibition center in Kyiv, on May 29, 2021.