Malaria is caused by a protist (a singled celled organism), not a virus. To some extent, you are right about the mosquito being a bigger target. However, the la

Malaria is caused by a protist (a singled celled organism), not a virus. To some extent, you are right about the mosquito being a bigger target. However, the larger reason is that Plasmodium populations (the protist) are larger than mosquito populations and, consequently, can evolve around human modifications faster.