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Evangeline E.
@evafe55
The terms an epidemiologist use
- Sporadic refers to a disease that occurs infrequently or irregularly.
- Cluster refers to a disease that occurs in larger numbers even though the actual number or cause may be uncertain.
- Endemic refers to the constant presence and/or general prevalence of a disease in a geographic population.
- Hyperendemic refers to persistent, high levels of disease well above what is seen in other populations.
- Epidemic refers to a sudden increase in the number of cases of a disease above what is normally expected.
- Outbreak is the same as an epidemic but is often used to describe a more limited geographic event.
- Pandemic refers to an epidemic that has spread over several countries or continents, usually affecting a large number of people.
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Evangeline E.
@evafe55
The 10 deadliest epidemics throughout history
The Third Cholera Pandemic (1852-1860)
Cholera is a bacterial infection and is mainly contracted through food and water.
The largest cholera outbreak originated in India and spread beyond its borders, killing about 23 000 people ...
The Asian Flu Pandemic (1957)
The Asian Flu Pandemic was an outbreak of avian influenza that started in China and spread worldwide.
The estimated death rate was one to two million people.
Typhus fever in World War 1 (1945)
Typhus fever is spread by lice. The war brought on poor sanitation that probably led to a higher density of lice and made the transmission more prevalent.
Typhus fever caused three million deaths in Russia alone.
Lauren W.
@lau_w51
Pandemics That Changed History: Timeline
Spreading of diseases
Transmissible diseases existed during humankind’s hunter-gatherer days, but the shift to agrarian life 10,000 years ago created communities that made epidemics more possible.
We started build...
430 B.C.: Plague of Athens
The earliest recorded pandemic happened during the Peloponnesian War. It passed through Libya, Ethiopia, and Egypt, and it reached Athens as the Spartans laid siege. Two-thirds of the population died.
The disease, suspected to have been typhoid fever, weakened the Athenians significantly and played a big role in their defeat by the Spartans.
165 A.D.: The Antonine Plague
It may have been an early appearance of smallpox that began with the Huns.
The Huns then infected the Germans, who passed it to the Romans and then returning troops spread it throughout the Roman empire. This plague continued until about 180 A.D., claiming Emperor Marcus Aurelius as one of its victims.
Aurora E.
@aurora_aee25
How canceled events and self-quarantines save lives, in one chart
Flattening the curve
It means that all the social distancing measures being adopted these days in many countries aren’t so much about preventing illness but rather slowing down the rate at which people get sick with...
Preventing system overload
Staying home during the pandemic helps prevent health systems from being overloaded.
Overloading hospitals can likely be averted with protective measures like closing schools, canceling mass gatherings, working from home, self-quarantine, self-isolation, avoiding crowds. All these keep the virus from spreading fast.
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