What you need to know about coronavirus

• The numbers: More than 6.6 million cases of Covid-19 have been reported worldwide, including at least 389,000 deaths, according to Johns Hopkins University.
• Study withdrawn: Research disputing the effectiveness of hydroxychloroquine as a treatment for coronavirus has been retracted after questions were raised over the data. Hydroxychloroquine was recommended a "gamechanger" by US President Donald Trump.
• In the US: More than 1.8 million coronavirus cases have been recorded, including at least 108,000 deaths.
• US forecast worsens: A forecast published by the US Centers for Disease Control and Prevention now projects more than 127,000 coronavirus deaths in the country by June 27.