Former FDA Commissioner Scott Gottlieb pointed out that “definitive” proof that a coronavirus outbreak occurred in the Wuhan lab could be found in blood samples from workers who are now known to have fallen sick and been hospitalised in November 2019. https://summit.news/2021/06/01/former-fda-commissioner-china-should-have-blood-samples-from-sick-wuhan-lab-workers-where-are-they/