What is a pendulum swing

Malaria is a common name for a global acute parasitic disease caused by Plasmodium, which is usually transmitted by the Anopheles mosquito. The main symptoms include chills and shivering, followed by goose bumps and a bluish complexion. After half an hour or an hour, the body temperature rises rapidly and a headache, red face, accompanied by nausea, vomiting, body aches and pains, and blurred, confused speech. After 4-8 hours, the body temperature begins to drop, the body sweats, and some people develop herpes and may even die from malaria. The disease is prevalent in the tropical regions of central Africa, South Asia, Southeast Asia, and northern South America. The most serious is Africa, because the disease is mainly caused by the poor environment and sanitary conditions that do not meet the basic living requirements. This situation has rarely occurred in our country.