Theory of diseases

Question 1

4 humours

Answer 1

Blood, Yellow Bile, Black Bile, Phlegm
400BC Hippocrates
If four humours(fluids) balanced then healthy if in imbalance then sickness

Question 2

Spontaneous Generation

Answer 2

matter rots and rotting causes disease
385-322BC Aristotle
evidence: fruit rots and eating rotten fruit makes you sick.

Question 3

Miasma

Answer 3

Bad air causes diseases.
Galen 130-201 CE
people living in dirty and smelly places get sick more often
Evidence: the River Thames stank during the summer months and people got ill around the smell

Question 4

Germ Theory

Answer 4

Louis Pasteur 1861
There are microorganisms in the air and the microorganisms cause matter to rot and spread disease.
There are discrepancies in how many microbes there are in different places cities have more mountain regions have less.
Microbes can be killed by heat (pasteurisation)
discovered through research on why Beer and Vinegar spoil