There are four types of malaria, but vivax and falciparum are the most common. 疟疾分为四种，其中最为常见的是间日疟和恶性疟。
Vivax is generally not a life-threatening disease, but falciparum can be rapidly fatal and requires prompt treatment. 间日疟一般不致命，但恶性疟可以在短时间内发作并致命，因此需要得到迅速的治疗。
