In October 2020, as scientists raced to develop a Covid shot, the head of the WHO warned against looming "vaccine nationalism". But is vaccine inequality the reason behind Omicron's emergence?
What are superbugs and how can we protect ourselves after the World Health Organization called antibiotic resistance "one of the biggest threats to global health, food security, and development"?
With global Covid cases declining, many countries are easing restrictions, but experts say it's far too soon to declare victory amid fears of the emergence of new and deadly variants of the virus
The UN health agency says the world has passed the "tragic milestone" of four million recorded Covid-19 fatalities, adding that the pandemic's true toll was probably higher