PRO/AH/EDR> COVID-19 update (16): vaccines, tracking variants, USA, travel, WHO, global

COVID-19 — United States
Like Moderna’s, Pfizer-BioNTech’s COVID vaccine uses messenger RNA, or mRNA, technology. In practice, the US Centers for Disease Control and Prevention says this “teaches our cells how to make a protein — or even just a piece of a protein– that triggers an immune response inside our bodies.”
The resulting immune response produces antibodies that help to protect people from becoming infected with the virus.
When asked how quickly BioNTech could pivot if it turned out the existing COVID