They are carrying Corona infected patient from the nursing home with Corona Outbreak. Look at those nursing home workers! They do NOT have any protective clothes at all! One of them have short sleeve shirt, and her skin has been exposed!
I tell you this nursing home is going to be like Diamond Princess, or even worse because all the people staying in the nursing home are elderly people with compromised immune system. And all the workers without proper protective gears and bodysuits, they will be infected with Coronavirus and spread wherever they go.