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  2. List of epidemics and pandemics - Wikipedia

    en.wikipedia.org/wiki/List_of_epidemics_and...

    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 ...

  3. Epidemic - Wikipedia

    en.wikipedia.org/wiki/Epidemic

    A zoonosis is an infectious disease of humans caused by a pathogen that can jump from a non-human host to a human. [35] Major diseases such as Ebola virus disease and salmonellosis are zoonoses. HIV was a zoonotic disease transmitted to humans in the early part of the 20th century, though it has now evolved into a separate human-only disease. [36]

  4. Contagious disease - Wikipedia

    en.wikipedia.org/wiki/Contagious_disease

    A contagious disease is an infectious disease that can be spread rapidly in several ways, including direct contact, indirect contact, and Droplet contact. [1] [2] These diseases are caused by organisms such as parasites, bacteria, fungi, and viruses. While many types of organisms live on the human body and are usually harmless, these organisms ...

  5. Infection - Wikipedia

    en.wikipedia.org/wiki/Infection

    An opportunistic disease requires impairment of host defenses, which may occur as a result of genetic defects (such as chronic granulomatous disease), exposure to antimicrobial drugs or immunosuppressive chemicals (as might occur following poisoning or cancer chemotherapy), exposure to ionizing radiation, or as a result of an infectious disease ...

  6. Disease outbreak - Wikipedia

    en.wikipedia.org/wiki/Disease_outbreak

    By convention, a communicable disease outbreak is declared over when a period of twice the incubation period of the infectious disease has elapsed without identification of any new case, however, for organisms with a short incubation period (e.g. fewer than ten days), a period of three times the incubation period is preferred. [11]

  7. If It Seems Like Everyone Has Norovirus, It's Because They ...

    www.aol.com/seems-everyone-norovirus-because...

    Cases of norovirus — the virulent, wildly contagious virus that causes vomiting and diarrhea — are increasing in the U.S., the Centers for Disease Control says, reporting double the amount of ...

  8. Disease - Wikipedia

    en.wikipedia.org/wiki/Disease

    The agents of communicable diseases are invaders; non-communicable diseases constitute internal insurrection or civil war. Because the threat is urgent, perhaps a matter of life and death, unthinkably radical, even oppressive, measures are society's and the patient's moral duty as they courageously mobilize to struggle against destruction.

  9. Epidemiology - Wikipedia

    en.wikipedia.org/wiki/Epidemiology

    Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in a defined population.. It is a cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.