Fifty-one patients who recovered from coronavirus in South Korea have tested positive again, raising fears the virus can be reactivated. The patients – from the country’s worst-hit city, Daegu – were put in quarantine after being diagnosed with the virus, then tested positive again days being released. Korea’s Centers for Disease Control and Prevention (KCDC) said the virus was likely ‘reactivated’, rather than patients becoming re-infected. Scientists at the Government-run health body believe the virus may lay dormant at undetectable levels in human cells. They say that for unknown reasons the viral particles can then be reactivated – but it is unclear if patients become infectious again. Experts say there is no evidence to prove that the virus acts in this way and studies in monkeys have actually shown the opposite. And they say in cases where patients produce a positive result twice, it is normally because of a test giving the wrong result, which happens one in five times. Fifty-one people who recovered from coronavirus in South Korea have tested positive again – raising fears the virus can be reactivated. Pictured: A church worker directs people to a drive-through worship in Seoul The number of people who’ve been diagnosed with…