Contagion

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Contagion

Excess correlation of delivering or bond returns. For example, under usual conditions we might observe a certain level of correlation of market returns. A period of contagion would be associated with much higher-than-expected correlation. Some examples are the conjectured contagion in East Asian markets beginning in July 1997 when the Thai currency devalued and the impact across many emerging markets of the Russian default. Contagion is difficult to identify because you need some sort of measure of the expected correlation. It is complicated because correlations are known to change through time, for example, see Erb, Harvey and Viskanta's article in the 1994 Financial Analysts Journal. In periods of negative returns, correlations (and volatility) are known to increase, so what might appear to be excessive may not be contagion.

Contagion

A recession or economic crisis that begins in one country and extends to others. For example, the late 2000s recession began with a large number of defaults on subprime mortgages in the United States. However, because investors worldwide invested in mortgage-backed securities backed by those mortgages, it affected portfolios and funds internationally and became a global meltdown. See also: Great Recession.
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The World Health Organization said Tuesday the global death toll from the contagious pneumonia has risen to 103 with infections reported in 19 countries and regions.
If the number of ill or exposed persons were large, the bio-agent were contagious, or both, an epidemic could last for weeks, and the demands on staff could be enormous.
To do that, the nation needs to develop epidemiological models that look at the effect of actions, such as quarantine and prophylaxis, on various potential contagious biohazards.
Besides, using a pathogen as contagious as influenza for any kind of germ warfare would be counterproductive, since it could not be contained by any means and would likely sweep the globe, attacking the target nation and aggressor alike.
Flu -- the short name for influenza -- is a highly contagious infection that causes fever, chills, dry cough, sore throat, runny or stuffy nose, as well as headache, muscle aches, and often extreme fatigue.
Health officials, not police officers, deal with community health problems, including individuals who have potentially infectious or contagious diseases.
The infection is considered often contagious for another 3 to 4 days after symptoms appear.
The new virus is as contagious as the "Melissa" virus reported this spring, company officials said.
Since the late 19th century, public health officials have mandated vaccines to prevent the spread of highly contagious diseases, such as smallpox, measles, and diphtheria.
In dairy goats - and all livestock - a "disease" is not necessarily a contagious thing that can be stopped with an injection of the right medication.