Pfizer, process 2

Two different manufacturing processes. Pfizer covid vaccines for the clinical trials were mostly produced using manufacturing ‘process 1’ whereas the vaccines used for population vaccination were produced using a different ‘process 2’ Interview with Josh Guetzkow PhD Here is the BMJ link: Josh’s handle on is @joshg99 and here is a link to a thread I did on P1 vs. P2: Here is a link to my blog: Here are links to my posts on the Pfizer clinical trial