More than 345 million doses of Covid-19 vaccines have been administered worldwide in the three months since mass inoculation began in December, but there is still a huge disparity in the vaccination rates between countries.
Some of the starkest differences can be found when comparing continents. In North America, 18 doses have been administered for every 100 people, while in South America, there have been just 4.9 vaccinations per 100 people amid growing outbreaks across much of the continent. Many African nations have yet to start vaccinations, with less than one dose administered across the continent per 100 people.
Until the bulk of the world’s population has been immunized, the virus will continue to evolve into variants that are more contagious, more deadly or that dodge the immune response at least in part, experts have warned. A global program led by the World Health Organization and other groups has made a few million doses of Covid-19 vaccines available to some African countries, but it is unlikely to have enough doses for the rest of the world before 2024.