The purpose of this document is to inform the public about biological and chemical hazards and thereby prepare the population for an immediate response in the event of an incident until public health support is provided. The agents reported here are: Anthrax, Botulism, Haemorrhagic Fever, Smallpox, the Plague, Tularaemia, Chlorine, Cyanide, Lewisite, Mustard Gas, Ricin, Sarin, Soman, Tabun and VX. This list is not exhaustive and no doubt other dangerous types could be produced. They have been selected as they are the most often mentioned threats. This information has been prepared with the public in mind, and thus much of the medical terminology has been removed and replaced with every day language. Also available in Arabic: http://www.who.int/csr/delibepidemics/biochem_threatsAR.pdf?ua=1