They do if they work with many coworkers who have numerous children who bring minor health issues home from school with them.
Gosh, perhaps workers without families should be a mandate pursued for employment? /s
Both my husband and I have been sick more in the past 3 years, than in the rest of our lives combined (he's 50 and I'm 45) and that coincides with our daughter starting school. Mind you, she rarely gets sick, but sure seems to bring all the bugs home :)
The sickliest kid in my daughter's preschool was the daughter of chiropractors who were vegetarians that didn't believe in vaccines and were fanatic anti-smokers.........