Which mosquito-borne infectious disease was deadly to many new arrivals, especially in the Southern colonies
Disease in colonial America:  Malaria was deadly to many new arrivals, especially in the Southern colonies. Malaria: Malaria is a mosquito-borne infectious disease affecting humans and other animals caused by parasitic protozoans (a group of single-celled microorganisms) belonging to the "Plasmodium" type.
Malaria