Doctors in the UK have called for urgent new treatments to clear persistent Covid infections after identifying the first person in the world known to have harboured the virus for more than a year.
The patient, who had a weakened immune system, caught the virus in 2020 and tested positive for Covid for 505 days before they died. Previously, the longest known PCR-confirmed case of Covid was a US cancer survivor in her 40s who tested positive for 335 days.
