RSV season is the time when your baby is most likely to catch RSV. Like the flu, RSV is seasonal, which means one is more likely to catch it during certain times of the year.
When is RSV season?
In most parts of the country, RSV season runs from fall into spring; however, RSV activity in your area may vary from season to season. In different parts of the country, RSV season might start and end at different times.
You can find out, based on CDC data, when RSV season started and ended in '10-'11 where you live. Then talk to your pediatrician about how to help protect your baby.