Has anyone seen studies about the risks of air travel on our young children?

So many of my adult family & friends all talk about getting sick after flying: people coughing & sneezing, dirty planes, etc. Well what about our children whose immune systems aren't as developed? When my child cries when the cabin pressure changes, is it doing any harm?

Any thoughts??

Wash your hands. Wash their hands. Wash them again.

And if they are less than 5 weeks old, don't bring 'em.