For half a century, doctors have known that infected mosquitoes spread malaria. The unsolved mystery has been: Where does the parasite that causes malaria hide out during the ten-day interval between the mosquito's bite and the appearance of the fever? An answer might cut down the world death rate from malaria, still nearly 2,000,000 victims a year.
Some ten years ago, Colonel Henry Edward Shortt, a British expert on tropical diseases, set out to find an answer. Last week he thought he had it: during the ten-day incubation, the parasite lurks in the liver.
No believer in hunches, Dr. Shortt tackled the puzzle...