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Written by Sarah Kellett The largest outbreak of Ebola ever recorded is happening in West Africa. Since February this year, more than 1000 people have been killed by the Ebola virus. Last week, the World Health Organization declared the outbreak a public health emergency of international concern.

Security systems are everywhere. Your home probably has locks on the doors. These protect you and your home, preventing people from entering and stealing items or causing damage. Biosecurity works in a similar way, except it involves protecting an area from the damage caused by pests and diseases.