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Widespread non-communicable diseases such as cardiovascular disease and cancer are not included. An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal infections , an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered ...
At critical points in American history the public health movement focused on different priorities. When epidemics or pandemics took place the movement focused on minimizing the disaster, as well as sponsoring long-term statistical and scientific research into finding ways to cure or prevent such dangerous diseases as smallpox, malaria, cholera.
Over the past 50,000–100,000 years, as modern humans increased in numbers and dispersed throughout the world, new infectious diseases emerged, including those caused by viruses. [1] Earlier, humans lived in small, isolated communities, and most epidemic diseases did not exist.
Epstein–Barr virus infectious mononucleosis (Mono) Diagnostic modalities for infectious mononucleosis include: Person's age, with highest risk at 10 to 30 years. Medical history, such as close contact with other people with infectious mononucleosis; Physical examination, including palpation of any enlarged lymph nodes in the neck, or enlarged ...
After tobacco mosaic was recognized as a virus disease, virus infections of many other plants were discovered. [34] The importance of tobacco mosaic virus in the history of viruses cannot be overstated. It was the first virus to be discovered, and the first to be crystallised and its structure shown in detail.
1970 – The Communicable Disease Center became the Center for Disease Control. 1971 – The National Center for Health Statistics conducted the first National Health and Nutrition Examination Survey, taking a snapshot of the health status of Americans. 1972 – Tuskegee Study of Untreated Syphilis in the Negro Male was brought to public attention.
Meanwhile, "latent" means that someone has tuberculosis but doesn’t have symptoms and can’t spread it to others, explains Thomas Russo, MD, a professor and chief of infectious disease at the ...
The natural history of a disease is sometimes said to start at the moment of exposure to causal agents. [2] Knowledge of the natural history of disease ranks alongside causal understanding in importance for disease prevention and control. Natural history of disease is one of the major elements of descriptive epidemiology. [2]