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Singapore, reeling from a new wave of infections that has forced a return to lockdowns, will lengthen the time between vaccination doses to stretch out supply. The city-state will also authorise the Pfizer shot for children as young as 12. Combining doses of vaccines from AstraZeneca and Pfizer is safe and gives people high levels of immunity, according to a study by Spain’s Instituto de Salud Carlos III. The research institution conducted one of the first studies into the combined use of shots that includes clinical trials. Britain will approve Johnson & Johnson’s one-dose vaccine “very imminently,” according to the UK drugs regulator. In the US, Texas banned local governments and schools from mandating mask-wearing.

Hong kongUnited kingdomUnited statesEastern capeSouth africaJohn abbamondiSalud carlosGreg abbottKennedy malamaJohnson covidBoris johnsonCenters for diseaseYork city barclays centerMinistry of health permanentNational basketball associationWorld economic forum