More than two-thirds of the world’s population probably have significant levels of Covid-19 antibodies, meaning they have either been infected or were vaccinated, the World Health Organization (WHO) said.
So-called seroprevalence rates surged to 67% in October from 16% in February of 2021, the WHO said, in a summary of studies from around the globe. Given the emergence of the fast-spreading omicron variant, the figure is probably even higher now.
