Vaccines and variants
B.1.1.7 is the UK variant
B.1.351 is the Soutnh Africa variant
P.1 is the Brazil variant
B.1.617 is the India variant
The boxes in colour are estimates based on modelling.
This information comes from http://www.healthdata.org/covid/covid-19-vaccine-efficacy-summary
But another source gives 88% efficacy against the India variant for Pfizer and 60% for AstraZeneca
And it says that one dose gives only 33% against the India variant, 50% against the UK variant.
In the UK, the India variant is responsible for 75% of new cases.
WHO has assigned new names for the variants. The UK, South Africa, Brazil and India variants are called Alpha, Beta, Gamma and Delta.
WHO is following the naming system that we devised for computer viruses, and for much the same reason.