Yet Japan has reported reinfections and I know I read of others so not so irresponsible
If you read up a little on the case of the one Japanese woman (yes it was just one) who was tested positive a couple of weeks after being cleared of the virus at a hospital, you will find that nearly all the experts thought that is a case of the original infection lying dormant and then perhaps reaching her lower respiratory system. At that point she reported a sore throat and chest pains and was tested again and found positive. There was a similar report of a Chinese woman presenting in that way.