Latest on the worldwide spread of the coronavirus

The United States is reviewing the need for a third COVID-19 booster shot among residents who have already been vaccinated, but needs to see more data to know if additional shots could raise people's risk of serious side effects, a U.S. health official said.

DEATHS AND INFECTIONS EUROPE * Spain surpassed 4 million coronavirus cases since the pandemic began after adding 43,960 new cases, as the more contagious Delta variant drives a surge of infections among unvaccinated young people. * Greece will require customers at indoor restaurants, bars and cafes to prove they have been vaccinated against COVID-19, the government said, to combat a surge in infections. * Scotland's first minister Nicola Sturgeon said the country was still on track to lift almost all COVID-19 restrictions by Aug. 9, but that face coverings would be required for some time after that. * All COVID-19 cases in the Lisbon area and the popular southern Algarve region are of the more contagious Delta variant, data showed, as Portuguese authorities scramble to bring under control a worrying surge in infections. * German Chancellor Angela Merkel warned more people needed to be vaccinated against COVID-19 before restrictions could be lifted, following news England will scrap nearly all curbs from next week.