you can strengthen your immune system by moderate germ exposure
the way vaccines work
just not too many of the same kind of germ
lots of many different germs the best
your skin and lungs grow good germs that eat the bad germs.
they need food or will die leaving you with no protection
I wash hands after reading newspapers to get rid of ink
not many people read newspapers so not many germs on them
Go to library when not crowded
Kids the noisiest sickest and germiest
Go to public library when kids in school
Early in the day, leave when school gets out.
Parents use libraries as baby sitters
Go to college library when students off or busy in class or something.
Summers the best all day