COVID-19 basics - Harvard Health
May 07, 2021· Another, called B.1.351, originated in South Africa. A third, called P.1 originated in Brazil. All three variants have now been detected in countries around the globe. All of these variants contain mutations on the virus''s spike protein. Spike proteins on the surface of the SARS-CoV-2 virus bind to and allow the virus to enter human cells.