P. vivax parasites can cause malignant malaria:
Malaria vivax should no longer be considered as being less severe than malaria falciparum as a study reveals that incompletely eradicated Plasmodium vivax parasites that invade the liver can cause malignant malaria.
Africa's deadliest malaria parasite has shown resistance in lab tests to one of the most powerful drugs on the market -- a warning of possible resistance to follow in patients, scientists said Friday.