That's what Mexico doesn't bother about. 'WASH YOUR HANDS and keep your fingers out of your mouth and eyes'. It's basic education. When that's lacking and large numbers of people live together-- who knows how many jammed in apartments -- opportunistic bugs like MRSA strike. (In Lowell, MA not long ago, police raided a small apartment house and found 900 illegals living there. You can bet some were using the same towel.)