The 6 are:
1.Inexpensive and readily available or easy to produce.
2.Spread though the air by winds or vent systems and inhaled into the lungs, or spread by ingesting contaminated food or water.
3.Survives sunlight, drying, and heat.
4.Causes death or severe disability.
5.Easily transmitted from person to person.
6.Difficult to prevent and/or has no effective treatment.
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