HHS.gov @HHSGov
Even after @US_FDA approves a vaccine, it continues to be studied to determine how well it works under real-world conditions. Learn more about how @CDCgov evaluates the effectiveness of COVID-19 vaccines at https://t.co/rTmJPOBxW1 https://t.co/VjAVYGotaS — PolitiTweet.org