More than ten billion doses have gone into arms in a remarkably short period of time — but scientists warn that woeful inequities in access remain.
Credit: Tafadzwa Ufumeli/Getty
Many nations began rolling out vaccines in late 2020 and early 2021, and since then more than 60% of the world’s population — 4.8 billion people — have received at least one dose of one of more than 20 different COVID-19 vaccines that have been approved by nations for use around the world. Some scientists caution that this continued inequity increases the risk of new SARS-CoV-2 variants emerging from poorly vaccinated populations.
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