> any adverse effects would have shown As I understand, the required teratogenicity study in rats with Pfizer is ongoing as of two weeks ago [1]. It’s rather o

> any adverse effects would have shown As I understand, the required teratogenicity study in rats with Pfizer is ongoing as of two weeks ago [1]. It’s rather optimistic to claim we’ve seen everything when even animal studies haven’t completed. Vaccine science itself is rapidly developing. Now I don’t think there will be issues with this drug, but surprises may lurk still. [1]: https://www.gov.uk/government/publications/regulatory-approval-of-pfizer-biontech-vaccine-for-covid-19/summary-public-assessment-report-for-pfizerbiontech-covid-19-vaccine https://www.gov.uk/government/publications/regulatory-approv...