4. Wheezing
Another common side effect of RSV is wheezing, or difficulty breathing. This can occur once again either as the result of the mucus build up in the throat or due to the throat lining becoming inflamed and thereby making it harder for air to get through. You might find yourself breathing more heavily or in a more labored fashion as you try to take more oxygen in, and you might find that this is most noticeable during activity or exercise.
Note that this symptom can be quite dangerous if you have a history of asthma as it can trigger an attack and potentially make it very difficult for you to breathe. Try to breathe calmly and carefully.