Diseases, Conditions, Syndromes

Tension between awareness and fatigue shapes COVID-19 spread

In the midst of the coronavirus pandemic, two human factors are battling it out: awareness of the virus's severe consequences and fatigue from nine months of pandemic precautions. The results of that battle can be seen in ...

Diseases, Conditions, Syndromes

The role of the sun in the spread of viral respiratory diseases

Why do most viral epidemics spread cyclically in autumn and winter in the globe's temperate regions? According to an interdisciplinary team of researchers of the Italian National Institute for Astrophysics, the University ...

Diseases, Conditions, Syndromes

Heterogeneous populations develop herd immunity quicker

In rapidly spreading epidemics such as the current coronavirus pandemic, it is usually expected that a majority of the population will be infected before herd immunity is achieved and the epidemic abates. The estimate of ...

Diseases, Conditions, Syndromes

Cause of 1990s Argentina cholera epidemic uncovered

The evolution of epidemic and endemic strains of the cholera-causing bacterium Vibrio cholerae in Argentina has been mapped in detail by researchers at the Wellcome Sanger Institute, the London School of Hygiene and Tropical ...

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Epidemic

In epidemiology, an epidemic (from Greek epi- upon + demos people) occurs when new cases of a certain disease, in a given human population, and during a given period, substantially exceed what is "expected," based on recent experience (the number of new cases in the population during a specified period of time is called the "incidence rate"). (An epizootic is the analogous circumstance within an animal population.) In recent usages, the disease is not required to be communicable; examples include cancer or heart disease.

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