THE HISTORY OF MEDICINE

SPIRITS

• Ancient societies drilled holes in people's heads
• They thought this would release the evil spirits that caused the disease

HUMORS

• Greek physician Hippocrates hypothesizes that humors causes diseases
• He believed that humors were fluids

HERBAL TREATMENTS

• People try to cure Black Death by using incense
• Black Death was caused by bacteria transmitted by rats' and fleas

ANATOMY

• People begin to study anatomy
• They found out how some parts of the human body work

GERM THEORY

• Louis Pasteur hypothesizes germs are caused by "small animals"
• This led to rapid understanding of diseases

ANTISEPTIC TECHNIQUE

• Joseph Lister starts to clean his tools after surgery
• He finds out that most of his patients didn't have infections after surgery

KOCH'S POSTULATES

• Robert Koch finds four conditions
• The conditions prove how a pathogen causes diseases

APPLYING ANTISEPTIC TECHNIQUE

• Cities around the world start drinking water with chlorine
• This reduces the cases of cholera

ANTIBIOTICS

• Sir Alexander Fleming discovers penicillin accidentally
• This helps cure people if they have an infection

POLIO VACCINE

• Jonas Salk's vaccine against polio becomes available
• The disease is then eliminated in the U.S in 1994

NEW DISEASES

• First cases of SARS appear in China
• This occurs in 2002

POLIO COMEBACK

• Worldwide efforts increase to vaccinate people against polio
• The virus reemerges in fewer than ten people in the U.S

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