The immune system

And it sure was effective against Smallpox, Polio, Rubella, Tetanus, Tuberculosis, Whooping Cough, Chickenpox, Diptheria...
 
Pointless to respond I suppose to such an eminently qualified epidemiologist . Sometimes it needs a boost as new viruses attack us .
Maybe human life expectancy of 40 in 1800 has improved to 80 due to advances in medical science ?
Your explanation ?
 
Pointless to respond I suppose to such an eminently qualified epidemiologist . Sometimes it needs a boost as new viruses attack us .
Maybe human life expectancy of 40 in 1800 has improved to 80 due to advances in medical science ?
Your explanation ?
"Pointless to respond" Goofy says. And then responds. :poop::geek:
 
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