A doctor checks a patient who is infected with Covid-19 at the Wuhan Red Cross Hospital in Wuhan, China. Covid-19 first emerged in Wuhan in 2019. Photograph: STR/AFP via Getty Images

Intelligence agencies in the US said on Friday they may never be able to identify the origins of Covid-19, as they released a new, more detailed versi(...)

The Huanan seafood market in Wuhan, China, ‘an early and major epicentre of Sars-CoV-2 infection’. Photograph: Getty Images

Covid-19 emerged naturally and is not is the product of an accidental leak from a Chinese laboratory, according to a team of internationally-regarded(...)

“It is time to turn down the heat of the rhetoric and turn up the light of scientific inquiry if we are to be better prepared to stem the next pandemic.” Photograph: Getty Images

There is no scientifically-validated evidence to support the theory that Covid-19 leaked from a laboratory in China, while more recent studies strongl(...)

The most closely related viruses in bats are about 97 per cent similar to Sars-CoV-2, but this is ‘still a big difference’

Despite all the focus on the Covid-19 pandemic, the ultimate cause remains a mystery. Ideas that once seemed to belong to the realm of conspiracy the(...)

A boy wears a mask while visiting the Chinese New Year Folk Art Lantern show with his father at Expo Garden on February 5th, 2021 in Wuhan. Photograph: Getty

A member of the World Health Organisation expert team investigating the origins of the coronavirus in Wuhan says Chinese authorities granted full acce(...)

Members of the World Health Organisation (WHO) team investigating the origins of the Covid-19 coronavirus. Photograph: Hector Retamal/ AFP via Getty

World Health Organisation (WHO) experts have visited an animal disease centre in the Chinese city of Wuhan as part of their investigation into the ori(...)

People surf in waves off Jumeira beach near the Burj al Arab hotel in Dubai. Dubai replaced its top health official on Sunday after coronavirus cases in the United Arab Emirates, of which it is part, spiked in recent weeks. Photograph: Christopher Pike/Bloomberg

After opening itself to New Year revellers, Dubai is now being blamed by several countries for spreading the coronavirus abroad, as questions swirl ab(...)

Pedestrians wearing a protective mask during the coronavirus pandemic walks along Seventh Avenue in Times Square, New York. Photograph: Frank Franklin II/AP Photo

New York state reported its lowest number of daily coronavirus deaths in many weeks – 84 – in what governor Andrew Cuomo described as a critical bench(...)

Donald Trump takes questions from reporters during a press briefing on Thursday. Photograph: Jim Lo Scalzo/ EPA

US president Donald Trump has said he was confident the coronavirus may have originated in a Chinese virology lab, but declined to describe the eviden(...)