US pushes back against call, says it'll continue to offer third shots to Americans; Israel has administered boosters to over 2.6 million

Europe director Hans Kluge says low vaccination rates on the continent are of particular concern, with skepticism of inoculation holding up stabilization of pandemic

With sending aid via Kabul airport is no longer possible, World Health Organization official says UN looking at shipping it through Mazar-i-Sharif airport

Official likens 3rd vaccine doses for those already immunized before millions around globe have received a single shot to giving 'extra life jackets' to those who already have them

Top health body official says world should be 'disgusted,' asks whether situation could be worse had there been an active effort to block the planet's poor from getting vaccinated

White House press secretary says it is a 'false choice' to demand wealthy nations halt third doses in order to supply poor countries

Organization bemoans rich nations that used 'most of the global supply' of shots now 'using even more of it'

Global health body says highly transmissible strain, first detected in India, has been recorded in 15 of 22 countries and territories in region, from Morocco to Pakistan

Wuhan lab denies any leaks; White House criticized Beijing's reaction as 'irresponsible and frankly dangerous,' saying this is not a time to be 'stonewalling'

World Health Organization says fatalities climbed for the first time after nine weeks of decline; infections up by 10%