Pfizer has finally come clean about its vaccine efficacy.

https://www.channelnewsasia.com/news/world/pfizer-says-south-african-covid-19-variant-could-significantly-14223676

The B1351 variant will reduce Pfizer's vaccine efficacy by 2/3.  What a significant reduction!

AstraZeneca's vaccine has proven to be ineffective against B1351.

https://www.swissinfo.ch/eng/reuters/south-africa-puts-astrazeneca-vaccinations-on-hold-over-variant-data/46352372

https://www.channelnewsasia.com/news/world/swiss-delay-astrazeneca-covid-19-vaccine-approval-order-more-14106346