Vaccines have allayed our concerns about new variants of the coronavirus, but they have not gone away. Each variation of SARS-CoV-2 upsets health officials, since its impact on transmission, virulence and even vaccine escape is always uncertain. This happened at the end of 2020 with the appearance of the British strain – B.1.1.7 – just when Europe was suffering the worst scourge of the pandemic. It was suggested that it could be more contagious and “possibly more lethal”, but it was only found that it was transmitted up to 57% faster and that it did not neutralize vaccines. Right now “it is already our variant”, as Fernando Simón said, and it is in more than 90% of the samples that are analyzed in Spain.
Why the dominance in Spain of the British variant (and not of the other two important ones) may be good news