Why are kids always sick these days?

When I was in school, there was one kid in my class who had asthma.  She would need her puffer once or twice throughout the school day.  No one thought much about it.

Nowadays, it seems that there is only a few kids in any given class who doesn’t have asthma or some significant allergy to something like nuts or seeds.  Our children’s classrooms are potentially life-threatening to some of these kids.