Malaria is usually caused by a mosquito bite and the parasite microbe is passed from the mosquito to the blood through a sharp hypoderme needle like sting.
Transmitted by transfusion of infected blood.

A typical attack consists of a cold stage, hot stage, and sweating stage
Cold stage:
In this stage of the disease there is sudden onset of fever with rigor and extreme cold.
Hot stage:
There is rise in temperature usually upto 41 degrees. There is intense headache.
Sweating stage:
Fever comes down with profuse sweating and the stage lasts for 2 hours