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What was the leading cause of death in the US at the turn of the 19th century?
Communicable disease, ie TB.
- Now it's heart disease, but still accounts for 25% of office visits.
- CD is now mostly resistant bacteria.
How many deaths in the world are due to communicable diseases?
- 25 MILLION!
- 1/3 of the world is infected with TB.
Who is the great grand-daddy of epidemiology?
- John Snow
- Realized pathogens can lurk in the environment.
What is the epidemiology triad?
Vector (where does the pathogen live/replicate?)
Know direct vs. indirect contact...