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History
Life expectancy has improved by double over the last 150 years (this is because of health science)
Main causes of death in 1900s:
- Pneumonia
- Tuberculosis
- Influenza
Main causes of death in 2004:
- Heart disease/ stroke
- Cancer
Reasons for Improved Health
- Improved sanitation (toilets instead of outhouses)
- Clean drinking water (sewers flowed into drinking water)
- Refrigeration (prevents food spoilage)
- Vaccination (very successful for viral disease; eliminated small pox)
- Antibiotics
North American Drug Market
Prescription drugs - $300 billion
Over the Counter (OTC) drugs - $25 billion
Types of Medical Treatment
Surgical remove body part (traditional; no anesthetic used) modern surgery used anesthetic
Medicinal use chemical compounds to treat disease (drugs)
* only difference between a drug and a poison is the dose
Strong Poisons
- Easily identified (die immediately adterO
- Low doses -> make into drug
Weak Poisons
- Need a lot to have an effect
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