A Covid-19 vaccine developed in China has shown success in mid-stage trials, researchers say.
A new vaccine that protects against Covid-19 is nearly 95% effective, early data from US company Moderna shows.
A major trial of a vaccine to protect against Covid-19 has launched in the UK - the third such trial in the country.
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New York has introduced new restrictions aimed at curbing coronavirus, with Mayor Bill de Blasio warning it was the city's "last chance" to stop a second wave.
Early results from trials of a Covid vaccine developed in Russia suggest it could be 92% effective.
The first effective coronavirus vaccine can prevent more than 90% of people from getting Covid-19, a preliminary analysis shows.
The total of confirmed coronavirus cases has surged past 50 million following record numbers of new cases in several countries.
Poor diets for school-age children may contribute to an average height gap of 20cm (7.9in) between the tallest and shortest nations, an analysis suggests.
In India's boiling summers, temperatures can easily rise to 50C (122F).
Your earwax could be a window into your mental health, researchers have suggested.
