Actually my daughter was admitted Feb. of 2003 for a respiratory virus. We took her into the emergency room early that morning because her breathing was VERY labored. (plus had a high fever) I could see her ribs suck in when she took a breath. They pointed that out to me in the E.R. and said that was a sure sign of asthma. I kept telling them she didn’t HAVE asthma. They said well she is asthmatic. I kept arguing. So they explained to me that the respiratory virus that she contracted was very much like RSV they find in infants. This caused her to be "asthmatic". I was like ok. Then they sent her home with a nebulizer. I was so puzzled and again asked my million questions. They said once this type of resp. problem occurs, it would most likely happen again. So I took the nebulizer to be cautious. Next cold she got, she almost ended up in the E.R. AGAIN! But this time she got a breathing treatment in her ped. office and her blood gasses came back up to a safe level. She kept on fighting off the start of pnemonia constantly after that but we learned when to give those breathing treatments to keep the pnemonia away. (which made her VERY jumpy because of the drug that is inhaled) That April she was outside running with my husband. She stopped for a moment and started to cough this dry cough. I told her to come in and get a drink. She opened the door and looked at me with a panicked face and told me she couldn’t breathe. She could barely get the words out. I ran and got the nebulizer and quickly gave her a breathing treatment. By the time she got the treatment she was feeling much better. I called the ped. the next morning and she told me it was time she sees a respiratory clinic at our local Children’s Hospital. There they ran some breathing tests and it showed she has asthma. They then said this mild to moderate asthma had to be caused by something in her environment. We told them what she was around and they tested for that. It was a simple scratch test. They tested for all the animals she is usually around, the ones she lives with and then season changes. (rag weed ect.) They put her on a daily steriod which I do not like but it seems to have kept her without problems (KNOCK ON WOOD!)  It is inhaled twice a day and it is called Advair Diskus. Of course an infant certainly cannot inhale this. But is has worked for my daughter who is 6. The allergies has been removed and her breathing has been better. See what your pediatrician has to say. Good luck!