Per CDC:
What you need to know
Malaria is a serious disease caused by a parasite that infects a certain type of mosquito.
Most people get malaria from the bite of an infective mosquito.
Malaria can be a deadly disease if not diagnosed and treated quickly. Starting treatment as soon as possible can often prevent severe illness and death.
About
The risk of malaria in the United States is very low. People do not spread malaria to other people, like the common cold or the flu. Also, malaria is not sexually transmitted. The U.S. reports about 2,000 cases of malaria each year. Most of these cases are in people traveling to areas where malaria spreads.
Symptoms
Malaria symptoms range from very mild illness to severe disease and even death.
Early Symptoms can include:
Fever and flu-like illness
Chills
Headache, muscle aches, and tiredness
Nausea, vomiting, and diarrhea may also occur.
If not treated quickly, the infection can become severe.
Severe symptoms can include:
kidney failure
seizures
mental confusion
coma
To learn more visit: CDC - Malaria - Malaria Disease Basics