Some 115,000 health care workers died from Covid-19 from January 2020 to May of this year, according to a new WHO estimate, as the agency pushed once again for efforts to address vaccine inequity. Globally, 2 in 5 health care workers are fully vaccinated, WHO Director-General Tedros Adhanom Ghebreyesus said at a briefing Thursday. But, he added, “that average masks huge differences across regions and economic groupings.”