The mortality caused by it is now being greatly reduced by giving away annually millions of doses of quinine, and by draining or spraying with petroleum places where mosquitoes breed, as well as by teaching the people the importance of sleeping under mosquito nets and the necessity of keeping patients suffering from active attacks of malaria where mosquitoes cannot get at them.

Only quinine of established quality is allowed in the market.
The results obtained in combating malaria are often very striking.

Calapan, the capital of Mindoro, was in Spanish days known as "the white man's grave" on account of the prevalence of "pernicious fever" there.

To-day it is an exceptionally healthy provincial town.
At Iwahig, in Palawan, the Spaniards attempted to conduct a penal colony.

They were compelled to abandon it on account of pernicious malaria, which caused continued serious mortality when the American government attempted to establish a similar institution there.