Changes come amid a national vaccination campaign in which children as young as 12 are eligible to get shots, as well as a general decline in COVID-19 hospitalizations and deaths

CDC official says new blood sample analysis indicates there were 'probably very rare and sporadic cases here earlier than we were aware'

US health agency recommends people still wear face coverings in big crowds

Inclusion on State Department's Level Four advisory, indicating 'unprecedented' risk, appears to be due to health officials' decision to lump Israel with West Bank and Gaza

CDC and FDA investigating 6 cases of clotting following inoculation; company says no link established between its shot and the 'thromboembolic events'

Agency says risk of catching virus through touch is 1 in 10,000, but continues to recommend hand-washing and disinfecting areas where COVID cases were present

US health body lumps together Israeli and Palestinian territories in travel advisory, despite COVID-19 spread tapering off in the Jewish state

Inoculated travelers no longer need to take virus tests or quarantine, US health agency says; 66,000 Americans being diagnosed with COVID-19 per day

US federal health officials concerned company may have provided an incomplete view of efficacy data; FDA to rule on authorization in coming weeks

Issue could become crucial ahead of Passover when families gather for Seder meal; US health body allows family meetings without face covering or social distancing