Walter Reed summary

Yellow fever, acute infectious disease, one of the great epidemic diseases of the tropical world, though it sometimes has occurred in temperate zones as well. The disease, caused by a flavivirus, infects humans, all species of monkeys, and certain other small mammals. The virus is transmitted from

Mosquito, (family Culicidae), any of approximately 3,500 species of familiar insects, some of which are important in public health because of the bloodsucking habits of the females. Mosquitoes are known to transmit serious diseases, including yellow fever, Zika fever, malaria, filariasis,

Army, a large organized armed force trained for war, especially on land. The term may be applied to a large unit organized for independent action, or it may be applied to a nation’s or ruler’s complete military organization for land warfare. Throughout history, the character and organization of

Bacteriology, branch of microbiology dealing with the study of bacteria. The beginnings of bacteriology paralleled the development of the microscope. The first person to see microorganisms was probably the Dutch naturalist Antonie van Leeuwenhoek, who in 1683 described some animalcules, as they