My triplets currently have it, luckily they have not have to be admitted, there are no antibiotics and it is highly contagious. My paed said anything from 2 to 6 weeks. We almost took our lg to hospital as her breathing was very short.
We're using saline as often as possible, illiadin 3 times a day, nebulizing, humidifier with karvol, tissue salts, bennets breathe easy kit and physio everyday, we're also using the nose frida care kit (u can suck out the mucous from their nose) we use that very often. We also do a bit of physio ourselves, where we lie baby but with head lower than chest and do percussions on their back so the mucous can go to the nasal area to be sucked out.
There is not much else other than the meds they do give u and what u do for them now.
It is very contagious. Our medical aid was going to pay for the vaccination for it but we were too late, the paed said its of no use to do it now because they already have it, it will go away but they have built antibodies.
Good luck, hope your lo gets well soon!