Tropical Mosquito-Borne Disease; Deadly
This page is the CodyCross answer for the clue below from Under the sea, Group 21, Puzzle 3.
Question is: Tropical Mosquito-Borne Disease; Deadly
and the answer is: MALARIA
Word Meaning:
MALARIA — (pathology) A disease spread by mosquito, in which a protozoan, Plasmodium, multiplies in blood every few days.
Definitions from Wiktionary.