Read MoreUK giving second dose of Pfizer-BioNTech vaccine up to 12 weeks after the first, but WHO recommends a shorter gap.UK giving second dose of Pfizer-BioNTech vaccine up to 12 weeks after the first, but WHO recommends a shorter gap.
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Read MoreUK giving second dose of Pfizer-BioNTech vaccine up to 12 weeks after the first, but WHO recommends a shorter gap.UK giving second dose of Pfizer-BioNTech vaccine up to 12 weeks after the first, but WHO recommends a shorter gap.