A mass cremation in New Delhi of people who died during a Covid surge in 2021. Photograph: Atul Loke/The New York Times

An ambitious effort by the World Health Organisation (WHO) to calculate the global death toll from the coronavirus pandemic has found that vastly more(...)

Sara Hayden: ‘Norwegians are not known to be the world’s chattiest, but when you speak their language they do talk’

From a commuter town to a ski commute, Sara Hayden travelled the world before finding the perfect work-life balance in Norway. Originally from Ashb(...)

WHO Europe director warns there is a “closing window of opportunity” for countries to prevent their health systems from being overwhelmed. Photograph: Ian Langsdon/EPA

There were more than seven million new cases of the Omicron variant of Covid-19 across Europe in the first week of January, more than doubling in two (...)

A Covid-19 testing site at Times Square, New York. The Omicron variant accounts for 13 per cent of Covid cases in New York. Photograph: Kena Betancur/AFP via Getty Images

Health experts have warned the US faces a huge challenge to contain the fast-spreading Omicron variant of Covid-19 due to relatively low vaccination r(...)

Members of the US House and Senate in a Moment of Silence for 800,000 American Lives Lost to Covid-19 at the US Capitol in Washington. Photograph: Shawn Thew/PA

The US death toll from Covid-19 topped 800,000 on Tuesday, a figure seen as doubly tragic given more than 200,000 of those lives were lost after the v(...)

Brian Shelton in Elyria, Ohio. Shelton may be the first person cured of type 1 diabetes. Photograph: Amber N Ford/The New York Times

Brian Shelton’s life was ruled by type 1 diabetes. When his blood sugar plummeted, he would lose consciousness without warning. He crashed his motorcy(...)

Chief medical officer Tony Holohan urged people to ‘keep your contacts low and avoid crowds’ and to meet outside if possible. Photograph: Gareth Chaney/Collins

Ireland could record more than 12,000 Covid-19 cases a day by Christmas, according to a forecast by US academics. Cases would peak at 12,300 a day in(...)

Stephen Hawking, who died in 2018, predicted black-hole behaviour almost five decades ago. Photograph: Frederick M Brown/Getty

A recent study of black holes confirmed a fundamental prediction that the theoretical physicist made nearly five decades ago. But the ultimate awar(...)

The more we drink caffeine, the more we build up our body’s tolerance to it. Photograph: iStock

Caffeine, the main active ingredient in coffee, has a well-justified reputation for being an energy booster. But caffeine is also a drug, which means (...)

Ireland’s population is set to peak at 5.8 million in 2057 before declining to 4.82 million by the end of the century. Photograph: iStock

Last year, researchers from the University of Washington forecast that the worldwide birth rate, which has been rapidly dropping since the 1960s, woul(...)

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