B.1.1.7 Variant Now Most Common Virus Strain in U.S., CDC Says But some scientists have urged caution while investigations are carried out. Maggie Wearmouth, a member of the UK.’s Joint Committee on Vaccination and Immunization, suggested that “perhaps slowing things down” might be wise. […] Adam Finn from the University of Bristol, also a member of the JCVI, said it was possible that Moderna or other vaccines could be reserved for younger groups in case Astra’s use was restricted. […] The UK. remains “on track” to offer a first dose to all over-50s by April 15, and to all adults by the end of July, he added. Johnson Faces Political Fight Over UK. Covid Passports Plan Three in five adults in the UK. have been vaccinated so far and the most recent government data shows that more than 31.6 million people have received a first dose, and 5.5 million have had a second dose.
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