Hep A and B are risks for medical researchers who handle human tissues or cells. For this reason, I have been vaccinated against both. There is no Hep C vaccine, so researchers still have to take chances when handling human products.
My point is that not everyone is exposed due to bad habits or poor hygiene.
Yep. I just read a news report yesterday that a bakery employee in central Michigan was found to have Hep A and exposed all the customers from late August to just a couple days ago.
The bakery was a part of a large regional chain store so a lot of people could have been exposed.