Global coronavirus cases pushed past 20 million, according to a Reuters tally, with the United States, Brazil and India accounting for more than half of all known infections.

An experimental coronavirus vaccine being developed by AstraZeneca and the University of Oxford was safe and produced an immune response in early-stage clinical trials, data showed, keeping alive the hope AZD1222 could be in use by the end of 2020.

British scientists analyzing data from a widely used Covid-19 symptom-tracking app have found there are six distinct types of the disease, each distinguished by a cluster of symptoms.

Hackers backed by the Russian state are trying to steal Covid-19 vaccine and treatment research from academic and pharmaceutical institutions around the world, Britain’s National Cyber Security Centre (NCSC) said.

A global trial designed to test whether the anti-malaria drugs hydroxychloroquine and chloroquine can prevent infection with COVID-19 is to restart after being approved by British regulators. 

The World Health Organization was moving to update guidelines on treating people stricken with COVID-19 to reflect results of a clinical trial that showed a cheap, common steroid can help save critically ill patients.

A cheap and widely used steroid called dexamethasone has become the first drug shown to be able to save lives among COVID-19 patients in what scientists said is a “major breakthrough” in the coronavirus pandemic.

Children have milder COVID-19 symptoms than adults and the balance of evidence suggests they may also have lower susceptibility and infectivity than adults, scientists advising the British government said.

Oxford University and AstraZeneca are recruiting around 10,000 adults and children in Britain for trials of an experimental coronavirus vaccine, a day after receiving U.S. backing worth up to $1.2 billion.

Healthcare workers in Britain and Thailand started taking part in a trial to determine whether two anti-malarial drugs can prevent COVID-19, including one that U.S. President Donald Trump says he has been taking.