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Despite their microscopic size, viruses are responsible for many childhood illnesses. When viruses invade human cells, they take over the cell's machinery to reproduce. As they grow in number they can cause illnesses, some of the serious.

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In the Event of Bioterrorism: Protecting Families from Deadly Diseases

The threat of bioterrorism has been on the minds of many parents, particularly since September 2001. Several infectious organisms have the potential to be used in acts of terrorism, and children are particularly vulnerable to these germs.