FDA Queries Pfizer on Spike Protein in June 2022

In June 2022 Pfizer Was Asked By the FDA How Much Spike Protein Their Vaccine Causes Cells to Produce & For How Long

PFIZER: “Obviously we don't have a complete understanding of the way the vaccine works in terms of producing an immune response” https://x.com/TheChiefNerd/status/1887948005250318812