I am excited for America and #publichealth that my mentor, @RWalensky will be leading the @CDCgov — she is a professor @harvardmed, an #NIH funded scientist, no stranger to testifying in congress, leader of @mgh_id,
1/OK so there *may* be new reports of allergy to #COVID19 vaccines but many other things (e.g., vasovagal syncope) can be misdiagnosed as allergy so we need more clinical details from the UK cnn.com/2020/12/09/hea…
2/ BUT, it is not surprising that allergic reactions might be identified during massive vaccination but not clinical trials because #allergy to vaccines are exceedingly rare (1 per million). In the @US_FDA report, AEs within 30 min for vaccine vs placebo were similar:
3/Most vaccine allergies come from the excipients and allergists can do skin testing to the vaccine and its excipients (often facilitating safe and totally unremarkable vaccination). Excipients are often shared for many approved vaccines: cdc.gov/vaccines/pubs/…