Pfizer plans to test coronavirus vaccine booster engineered for South African variant Phil Dormitzer, one of Pfizer's top viral vaccine scientists, said in an interview that he believes the current vaccine is highly likely to still protect against the concerning variant first discovered in South Africa Reuters | February 19, 2021 | Updated 10:59 IST A top Pfizer Inc scientist said on Thursday the company is in intensive discussions with regulators to test a booster shot version of its coronavirus vaccine specifically targeted for a highly contagious variant that is spreading widely in South Africa and elsewhere. Phil Dormitzer, one of Pfizer's top viral vaccine scientists, said in an interview that he believes the current vaccine - developed with Germany's BioNTech SE - is highly likely to still protect against the concerning variant first discovered in South Africa.