evidence: US FDA panel backs first Covid-19 jabs for children under five [...] The Food and Drug Administration’s vaccine advisers gave a thumbs-up to vaccines from Moderna and Pfizer for the littlest kids. [...] The same FDA panel on Tuesday backed Moderna’s half-sized shots for ages 6 to 11 and full-sized doses for teens. If authorized by the FDA, it would be the second option for those age groups. Currently the Pfizer vaccine is their only choice.