Red blood cells in which the malarial-fever parasite resides are eliminated from a person's body after 120 days
Because the parasite cannot travel to a new generation of red blood cells, any fever that develops in a person more than 120 days after that person has moved to a malaria-free region is not due to the malarial parasite
The fever caused by the malarial parasite may resemble the fever caused by flu viruses.