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US first lady Jill Biden has tested positive for Covid-19, the White House said on Monday, days before President Joe Biden is scheduled to travel to the G20 summit in India. Biden was administered a test Monday evening and was negative, White House press secretary Karine Jean-Pierre said. “The president will test at a regular

Biden first raised eyebrows on Tuesday by removing his mask while draping the Medal of Honour around the neck of an octogenarian Vietnam war veteran at the White House. Just hours earlier aides had said he would obey US masking guidelines following his wife Jill’s positive diagnosis on Monday, including wearing one around others. US

The World Health Organization warned of “concerning trends” for Covid-19 ahead of winter in the Northern Hemisphere, calling for increased vaccinations and surveillance. While data is limited because many countries have stopped reporting Covid data, the UN health agency estimated that hundreds of thousands of people around the world were currently hospitalised with the virus.

However, a new UK-led study has shown that molnupiravir “can give rise to significantly mutated viruses which remain viable,” lead author Theo Sanderson said. Sanderson, a geneticist at London’s Francis Crick Institute, emphasised that there is no evidence that “molnupiravir has to date created more transmissible or more virulent viruses”. None of the variants that

Vaccine sceptics are attacking Travis Kelce for taking part in a Pfizer advertisement, recycling conspiracy theories about Covid-19 shots as the NFL star is getting attention for his rumoured romance with pop icon Taylor Swift. As Swift’s fans flooded social media with reactions to her appearance at last Sunday’s Kansas City Chiefs’ win over the

She believed mRNA held the key to treating diseases where having more of the right kind of protein can help – like repairing the brain after a stroke. Katalin Kariko and Drew Weissman. Photo: Peggy Peterson / Pennsylvania School of Medicine via AFP But the University of Pennsylvania, where Kariko was on track for a

Researchers from the United Kingdom’s University of Exeter and Institute of Psychiatry, Psychology and Neuroscience at King’s College London analysed brain function tests from more than 3,000 people who took part in the so-called Protect Study, launched in 2014 to gain an insight into the brain function of people over 40 over a 25-year period.

Noting that each country tended to look to its own interests and follow its own guidelines at the height of Covid-19, Liu said that a fully global response would be necessary to control future pandemics. Dr Joanne Liu from the Pandemic Emergency Readiness Lab at McGill University in Montreal, Canada, is disappointed that the world

Boris Johnson, the former British prime minister, struggled to come to grips with much of the science during the coronavirus pandemic, his chief scientific adviser said on Monday. In keenly awaited testimony to the country’s public inquiry into the Covid-19 pandemic, Patrick Vallance said he and others faced repeated problems getting Johnson to understand the

China has denied there was any cover-up, but for the past three years it has had to fight a fierce publicity battle to defend its reputation and restore international trust. That is why the response by the WHO and Beijing to this latest outbreak is so important for the image of both. Loss of smell

Former British Prime Minister Boris Johnson said on Wednesday he was deeply sorry for the loss of life during the Covid-19 pandemic as he appeared as a witness at the official inquiry into Britain’s handling of the pandemic. Johnson said at the start of the hearing how glad he was to give evidence and how