Worldwide coronavirus cases top 30 million

Healthcare worker Mariela Jacobo conducts a nasal swab test on a woman for Covid-19 from inside a freestanding coronavirus testing isolation booth, at the Posadas hospital, in Buenos Aires, Argentina (AP)

Confirmed cases of the coronavirus have topped 30 million worldwide, according to figures from Johns Hopkins University.

More than half of the total Covid-19 infections have been recorded in just three countries – the US, India and Brazil – according to the US university’s tally.