B.B.
My 2 1/2 yr old had the H1N1 nasal mist vaccine last week. She became congested the next day with a wet cough. I also called the pediatrician who said the side effects generally resolve quickly. I also spoke with someone who's mother works for NIH and she said that it's also possible that a child could be exposed to something prior to getting the vaccine that would erupt and seem like it may be a vaccine side effect. My daughter's cough went away in about 1-2 days. Her congestion was almost gone in about 2-3 days. She still has a little congestion about 1 week later but I think it may be related to allergies. Good luck!