A mistake by a leading Chinese official may have disclosed the name, address and details about one of the first people suspected of being infected with Covid-19 in Wuhan, three weeks before Beijing authorities claim they detected the initial case. The astonishing error, revealed in a screen-grab sent to a Chinese medical journal, shows that the 61-year-old woman, known as ‘Patient Su’, lived about a mile from one of the city’s main coronavirus research labs. She was also close to a stop for the high-speed rail line that is believed to have played a key role in spreading the virus around the city of 11 million people.