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If you thought dangerous epidemics were stuck in history books, think again. As Zika recently showed, epidemics are still a threat in the age of modern medicine and scientists work hard to study them.
An epidemic is caused when a disease spreads over a large area, affects a large number of people at the same time and spreads faster than doctors can control. The outbreak of an epidemic can be caused by conditions like contaminated drinking water, antibiotic resistance or the migration of animals.
In this zone, you might meet a scientist using maths to predict how many people could be affected by an infectious disease, or someone researching new treatments.