Karras had been told she was probably “one of the safest people in the country” by a researcher she asked. As recently as mid-March, fewer than 5,000 people in the United States had tested positive for the new coronavirus. But the first large wave of COVID-19 survivors, likely to be endowed with a power known to infectious disease specialists as adaptive immunity, is emerging. But the state health department said people who had tested positive for the coronavirus were allowed to leave self-isolation seven days after their first symptom and three days after their last fever. Walter Lamkin, 69, general counsel for a company in St Louis, tested positive in March and was cleared by the St Louis County public health department in early April.

Source: bd News24 April 11, 2020 17:26 UTC