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  2. Infectious mononucleosis - Wikipedia

    en.wikipedia.org/wiki/Infectious_mononucleosis

    Infectious mononucleosis (IM, mono), also known as glandular fever, is an infection usually caused by the Epstein–Barr virus (EBV). [ 2 ] [ 3 ] Most people are infected by the virus as children, when the disease produces few or no symptoms. [ 2 ]

  3. Environmental epidemiology - Wikipedia

    en.wikipedia.org/wiki/Environmental_epidemiology

    Environmental epidemiology studies are most frequently observational in nature, [14] meaning researchers look at people's exposures to environmental factors without intervening and then observe the patterns that emerge. This is due to the fact that it is often unethical or unfeasible to conduct an experimental study of environmental factors in ...

  4. Wild animal suffering - Wikipedia

    en.wikipedia.org/wiki/Wild_animal_suffering

    Wild animals can experience injury from a variety of causes such as predation; intraspecific competition; accidents, which can cause fractures, crushing injuries, eye injuries and wing tears; self-amputation; molting, a common source of injury for arthropods; extreme weather conditions, such as storms, extreme heat or cold weather; and natural disasters.

  5. Environmental hazard - Wikipedia

    en.wikipedia.org/wiki/Environmental_hazard

    Environmental hazards can be categorized in many different ways. One of them is — chemical, physical, biological, and psychological. Chemical hazards are substances that can cause harm or damage to humans, animals, or the environment. They can be in the form of solids, liquids, gases, mists, dusts, fumes, and vapors.

  6. Zoonosis - Wikipedia

    en.wikipedia.org/wiki/Zoonosis

    A zoonosis (/ z oʊ ˈ ɒ n ə s ɪ s, ˌ z oʊ ə ˈ n oʊ s ɪ s / ⓘ; [1] pl.: zoonoses) or zoonotic disease is an infectious disease of humans caused by a pathogen (an infectious agent, such as a bacterium, virus, parasite, or prion) that can jump from a non-human vertebrate to a human. When humans infect non-humans, it is called reverse ...

  7. Bird flu is highly lethal to some animals, but not to others ...

    www.aol.com/lifestyle/bird-flu-highly-lethal...

    Those viruses became deadly human contagions and spread in animals and people. A number of experts think it’s unlikely this virus will become a deadly global contagion, based on current evidence ...

  8. Giant chicken frog faces extinction due to a deadly amphibian ...

    www.aol.com/giant-chicken-frog-faces-extinction...

    The population of the mountain chicken frog, once abundant in the Caribbean, has dropped by over 99% in 20 years due to a deadly fungal disease.

  9. Global catastrophe scenarios - Wikipedia

    en.wikipedia.org/wiki/Global_catastrophe_scenarios

    Others are non-anthropogenic or natural, such as meteor impacts or supervolcanoes. The impact of these scenarios can vary widely, depending on the cause and the severity of the event, ranging from temporary economic disruption to human extinction. Many societal collapses have already happened throughout human history.