RE: USA8 Feb 2021 18:54
"U.S. health officials, including Dr. Anthony Fauci, have expressed concerns about the Covid mutations that could potentially evade the protection of vaccines currently on the market. Moderna, Johnson & Johnson and Novavax have already said their vaccines may be less potent against B.1.351, the highly contagious strain found in South Africa."
It will be testing, testing and more testing.....