Please watch it very very very very very closely. I know how everyone is saying it will be okay and most likely it will. My friend lost her 5 week old grandson to it. He was nursing then gone 5 minutes later. It was the most horrible time for that whole family. He had been to the doc the day before.
The couple had a set of twins after that and the parents took turns sleeping so that one of them could always be watching the kiddos sleep.
The treatments the docs gave to you should be followed to the letter. Do not skip any even if you think the child is getting better and may not need it. Do not skip it. Do it for as long as possible until the doc is positive the virus is gone.
We had 1 in the hospital for a week and the next one that came was the same but did not test positive for RSV, she had pneumonia. They are both serious illnesses so just be sure to watch carefully and do the treatments to keep those airways open. It is a serious illness, don't let anyone tell you it's not. It is serious but he should come through it fine.