Two years ago, the Brazilian government launched a multi-million dollar programme to tackle what it called the epidemic spread of crack.
Should an epidemic spread inside the firm, it could wreak havoc on the Immigration and Naturalization Service's database, disrupt Continental Airlines' flight operations or destroy Medicare records.
And the pertussis epidemic has spread to Ohio, where two counties collectively report 910 cases this year, the largest number in 25 years.
The war killed civilians as well, as battles raged across farm and field, as encampments of troops spread epidemic disease, as guerrillas ensnared women and even children in violence and reprisals, as draft rioters targeted innocent citizens, as shortages of food in parts of the South brought starvation.
There is real hope that HIV treatment can make a difference to the spread of the epidemic.
If we maintain what is called "herd immunity", then even if there is an outbreak, it will not spread and become an epidemic.
As a result, a polio epidemic which originated in Kanohas now spread to 22 African countries, including ten who had been previously free of the disease.
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Numbers of livestock have fallen by 40%, partly thanks to an epidemic of screw worms that had spread to two-thirds of Iraq's provinces by the end of last year.
Dr. CHRIS LANSEN (Physician, Doctors Without Borders Hospital, Dubea, Democratic Republic of Congo): Of course, in a camp with almost 9, 000 people and poor sanitation, we're very worried about that, because that could then spread out into an epidemic.
In addition, a cholera epidemic sweeping the country has claimed several lives and spread to neighboring South Africa.
Scientists think HIV probably crossed into humans as far back as the early 1900s, but it wasn't until air travel became common that the virus spread, and AIDS became a global epidemic in the 1980s.
When the full explanation for the modern epidemic of obesity has emerged, it is unlikely that the spread of artificial lighting will be the whole of it.
The group held Mugabe's government responsible for the cholera epidemic that broke out early last month in the capital city and has since spread to other parts of the country.
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