The Panama Puzzle

Since the 1860s, Carlos J. Finlay, a local physician in Havana (that's him opposite), has insisted that mosquitos spread this disease. But how can we prove it?

• Try to show that the disease is not spread by personal possessions/clothing of victims

• Try to show that the disease is transmitted in the blood of victims ?

• Try to show that mosquitos could spread the disease from victims to human volunteers (!)

What do you think we should try first?