I've been more concerned about the coronavirus being observed after 6 days on stacked books and 2-3 days on other materials. Even with librarian vigilance, not a risk I can take with my current health concerns.
Love my local libraries though, I have cards with three neighboring cities and was on a first name basis with the closest location's desk clerks pre-Vid.
And with Inter-library loan feature...I can get practically any book in the USA.