Asthma hospitalizations peak 17 days after Labor Day , studies show . Outdoor and indoor allergens can work together to create ` ` perfect storm '' for asthma . Contagious viral infections can also play a role when students go back to school .
Asthma hospitalizations peak 17 days after Labor Day , studies show . Outdoor and indoor allergens can work together to create `` perfect storm '' for asthma . Contagious viral infections can also play a role when kids go back to school .