Malaria is an old world disease that was introduced into the new world
by disease carriers.

No mosquitoes equals no malaria.  Cold weather naturally kills off
mosquitoes.
Or, no disease carriers equals no malaria.

An additional problem in the tropics is that monkeys and apes are also
disease carriers. Mosquitoes thrive in hot weather, rain forests, and
swamps.

http://archive.idrc.ca/books/reports/1996/01-05e.html
"In 1987, Dr. Manuel Elkin Patarroyo, a biochemist from Colombia,
developed the first synthetic vaccine against the Plasmodium
falciparum parasite. The vaccine is still being developed and has not
yet proven to reduce deaths in Africa. In 1992, Dr. Patarroyo donated
the vaccine to the World Health Organization."

CORRECTION! There is a malaria vaccine.  It simply cannot be shown
that it works.  Probably because like all allopathic vaccines and
drugs, they fundamentally don't work!
--
john gohde
http://gnu-dictionary.naturalhealthperspective.com/