Which parts of the body does it usually infect (at both the organic & cellular levels)?
Parasites (sporozoite stage) are injected into the skin capillaries by a mosquito. From there they travel via the bloodstream to the liver, where they develop and multiply in liver cells before entering the blood stream again (merozoite stage) and invading for further reproduction. From there other internal organs, e.g. the brain, can be affected as clumps of heavily infected erythrocytes start blocking capillary blood flow.