Americans who are at high risk of contracting Covid-19 will now be allowed to receive a booster shot of any of the three vaccines authorised for use in the US, after regulators approved so-called mix and match dosing.
The US Food and Drug Administration announced on Wednesday it was authorising both Moderna and Johnson & Johnson to supply booster shots of their vaccines to people aged 65 and over, or younger adults whose health or jobs put them at a higher risk of contracting Covid. The decision comes a month after the FDA did the same for the BioNTech/Pfizer vaccine.
The regulator added that people will be allowed to receive any of the three authorised shots, regardless of which they received in their initial course.
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