urgent alert has been issued to find the other case after the test came back positive on February 14.The Brazilian strain has been designated “of concern” as it shares key mutations with the variant detected in South Africa, which is more transmissible than the original strain.Concerns have been raised vaccines may not be as effective against the variant.But Professor Stephen Powis, the national medical director of NHS England, said jabs could be rapidly adapted.And Boris Johnson said: "We don't have any reason at the present time to think that our vaccines are ineffective against these new variants of all types."Public Health England "don't think that there is a threat to the wider public", he added.The Prime Minister said a "massive.