辉瑞在研究对新冠病毒进行突变，有没有懂医学的朋友讲讲这是常规操作吗？

<p>来源： <a href="https://www.rubio.senate.gov/public/index.cfm/2023/1/rubio-sends-letter-to-pfizer-ceo-on-alleged-gain-of-function-research" rel="nofollow">https://www.rubio.senate.gov/public/index.cfm/2023/1/rubio-sends-letter-to-pfizer-ceo-on-alleged-gain-of-function-research</a></p> <p><a href="https://twitter.com/Project_Veritas/status/1618405890612420609" rel="nofollow">https://twitter.com/Project_Veritas/status/1618405890612420609</a></p> <p><a href="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" rel="nofollow">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</a></p> <p>辉瑞的回应：</p> <p><a href="https://www.pfizer.com/news/announcements/pfizer-responds-research-claims" rel="nofollow">https://www.pfizer.com/news/announcements/pfizer-responds-research-claims</a></p>