Hi Gena,
according to [https://en.wikipedia.org/wiki/Malaria|wikipedia], malaria has these symptoms mainly:
"The presentation may include headache, fever, shivering, ((Musculoskeletal - Connective Tissue|joint)) pain, vomiting, hemolytic anemia, jaundice, hemoglobin in the urine, ((Sensory - Eyes - Retina|retinal)) damage, and ((Digestive - Stomach - Mucosa (Fundus and Great Curvature)|convulsions)).

The classic symptom of malaria is paroxysm—a cyclical occurrence of sudden coldness followed by shivering and then fever and sweating, occurring every two days (tertian fever) in P. vivax and P. ovale infections, and every three days (quartan fever) for P. malariae. P. falciparum infection can cause recurrent fever every 36–48 hours, or a less pronounced and almost continuous fever."

These conditions are observed after infection with microorganisms ([https://en.wikipedia.org/wiki/Plasmodium|Plasmodium]) injected by mosquitoes.
So in META-Health, we want to note that this injection bypasses the body's natural barrier the skin. Therefore, it's not really the case that the individual "invited" the right microorganisms, but that also poisoning is possible for this case, leading to a biological reaction to try and rid oneself of the damaging substance. This would of course explain vomiting, diarrhea and exhaustion symptoms.

However, I believe that the individual presentation targets the "achilles heels" of the infected, and that special symptoms would match with present conflict themes.

Repeating bouts of fever and coldness would then represent regeneration phase A (warmth) and healing peaks/stress phases (cold, shivering).
To me, this seems to be a dramatic regeneration, coming in waves to not completely overwhelm the body