A first, small study suggests Omicron is a larger threat to Covid-19 immunity than other variants.

A first, small study suggests Omicron is a larger threat to Covid-19 immunity than other variants – STAT

Original Study: SARS-CoV-2 Omicron has extensive but incomplete escape of Pfizer BNT162b2 elicited neutralization and requires ACE2 for infection – medRxiv

Commentary from the author on Twitter (thread – click for more)

We have completed our first experiments on neutralization of Omicron by Pfizer BNT162b2 vaccination elicited immunity

Manuscript available at https://t.co/rGaEB9GdmS

and should be available on medRxiv in the coming days

— Alex Sigal (@sigallab) December 7, 2021

See also (thread – click for more)

New work from AHRI's @sigallab strongly suggests that the SARS-CoV-2 #Omicron variant escapes antibody immunity induced by the Pfizer vaccine, but that considerable immunity is retained in people who were both vaccinated & previously infected. https://t.co/AZWi3qexin pic.twitter.com/3phPFyKEPh

— Africa Health Research Institute (@AHRI_News) December 7, 2021