1.   A few can get sick of hearing and reading about injuries, except the Astros have had their share of guys get sick, too.

2.   You might think those who are around lots of other people come in contact with a variety of germs and get sick - often.

3.   Just how many get sick is not known.

4.   People get sick when those spores germinate deep in the lungs, letting the bacteria break out and multiply.