https://www.rubio.senate.gov/public/index.cfm/2023/1/rubio-sends-letter-to-pfizer-ceo-on-alleged-gain-of-function-research
https://twitter.com/Project_Veritas/status/1618405890612420609
https://mynbc15.com/news/nation-world/undercover-video-allegedly-shows-pfizer-exec-suspects-covid-resulted-from-virus-mutations-in-wuhan-coronavirus-jordon-trishton-walker-project-veritas
辉瑞的回应：
https://www.pfizer.com/news/announcements/pfizer-responds-research-claims
