Sources: Papers On Health
Is now known to be conveyed by the bite of a certain kind of
mosquito. Those who live in a malarious district should carefully
exclude these from their houses, and by draining swamps and covering
water butts prevent their breeding, which is always in stagnant water.
If, however, exposure to infection cannot be prevented, much may be
done to strengthen the system to resist it. Firstly, note that there is
a great deal in the food and drink of a family compelled to live in
such a district. If they live largely on animal food, and drink
alcoholic liquors, they will seriously add to the power of malarial
influence. The use of simple food and pure water will very much
lessen it. Let us note that the very opposite of the popular
superstition is the truth. A single glassful of gin, whiskey, or
brandy, instead of "fortifying" against such infection, actually knocks
down the "fortifications" which nature has reared against its power.
These drinks, then, must be strictly avoided.