Guidance:
Parents do not have to worry too much, as long as there is no continued exposure, usually a few days will return to normal, it is recommended that the future as far as possible to avoid going to crowded and noisy places to go
Parents do not need to worry too much, as long as there is no continued exposure, usually a few days to return to normal. The first thing you need to do is to avoid going to a crowded and noisy place.