new. so "world news tonight" is coming up next. thanks for joining us. have a g w weeks before the first reported death. tonight, how long the virus might have gone undetected here in the u.s. in nearly a half dozen cities. what we've now learned. also, president trump speaking just moments ago. as we also learn tonight of a heartbreaking headline here in new york. the infant daughter of a new york city firefighter has died, just five months old. new york state reporting 1,300 hospitalizations per day. 438 deaths in just 24 hours. governor andrew cuomo revealing preliminary results of antibody tests across new york state. and in new york city, as well, what the numbers reveal. how many people may have been exposed to the virus and how many might have some form of immunity. tonight, we're out across