CityMD mistakenly told 15,000 people with coronavirus antibodies they're immune

Urgent care provider CityMD accidentally told 15,000 people in New York and New Jersey who tested positive for coronavirus antibodies that they’re immune to the virus, despite what public health officials say. Public health officials say it remains unclear whether those with antibodies against the coronavirus are immune to reinfection. Since CNBC reached out for comment, CityMD has corrected the language and is reaching out to affected patients, a spokesman said.