Y
Hacker News
new
|
ask
|
show
|
jobs
by
xigoi
1479 days ago
Do you need to memorize the names of various bacteria in order to see that your hands become less dirty when you wash them? No.
1 comments
astrange
1479 days ago
But you need to know how aerosol transmission works to know why disposable towels are cleaner than hand dryers.
link