South Africa is set to expand its nationwide rollout of Covid-19 vaccinations as the country braces for a potential third wave of the coronavirus pandemic that officials fear could materialize in the coming weeks.

Beginning Monday, South Africans aged 60 and older will be able to receive the vaccine as part of the second phase of a rollout that began in February. To date, roughly 431,000 healthcare workers in the country have received the Covid-19 shot created by the pharma giant Johnson & Johnson, which the country was the world’s first to administer. A broadening of the program for vaccinating healthcare workers sent hundreds of such workers and others to vaccine sites this week in search of shots.

The jabs slated to start Monday will be administered with a dose of urgency. Cases of Covid-19 have increased in South Africa recently after remaining relatively flat since a second wave of the pandemic ended in February. Over the past seven days, the country has recorded a 46% uptick in cases nationwide, though the rise comes off a low base. South Africa now has roughly 23 cases of infection for every 100,000 people, compared with 90 cases per 100,000 in the U.S. and about 200 cases per 100,000 in India.

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