Group of experts advising FDA convenes to decide whether to approve administering extra shots of Pfizer's coronavirus vaccine

Amid rise in US coronavirus cases, president's executive order will mandate vaccination for everyone in the federal government — with no option to test out

Agencies awaiting critical info from vaccine makers; Moderna looking increasingly likely to require more time beyond September 20 target

Authorities plan to begin administering 3rd doses to Americans in September, saying it's 'very clear' vaccines are less effective at preventing infection over time

US health agency lists the country, alongside the West Bank and Gaza, as having a 'very high level' of COVID-19; urges even vaccinated Americans to avoid those areas

Unvaccinated survivors more than twice as likely to get reinfected, research indicates, dispelling belief that recovered are largely immune, particularly with new variants

CDC presentation delcared 'The war has changed' as a result of new strain, warns infections in vaccinated individuals may be as transmissible as in the unvaccinated

Citing new information on delta variant's ability to spread even among fully vaccinated, CDC also recommends all children and teachers wear masks in schools

CDC raises alert for the Jewish state, West Bank and Gaza: 'All travelers may be at risk for getting and spreading COVID-19 variants'

Israel moving ahead with issuing 3rd dose to the immunocompromised; CDC and FDA say extra vaccine unnecessary 'at this time'