Good grief, they’re all over the Greek alphabet, and not in order. I’ve heard of the Delta, Epsilon, and Lambda strain, but what happened to Alpha, Beta, Gamma, Zeta, etc. etc?
RE: what happened to Alpha, Beta, Gamma, Zeta, etc. etc?
Alpha: UK Strain
Beta: South African strain
Gamma: Brazilian Manaus strain
Delta: the Indian strain, now becoming the dominant one in the USA