What is the effectiveness of a single dose of the Pfizer-BioNTech vaccine?
The mRNA Pfizer-BioNTech vaccine was the first vaccine against SARS- CoV- 2 to be made available. Two doses of the vaccine confer 95% protection against the original Wuhan strain of the virus. But this effectiveness is lessened if both vaccines are not given, and depends on the nature of variants. The UK took the decision to vaccinate […]