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• A report released in late 2008 warned that the United States was likely to see a terrorist attack involving weapons of mass destruction before 2013. The bipartisan commission behind the report warned that the attack would more likely involve biological weapons than nuclear weapons. In response, President Barack Obama's administration was urged to increase intelligence and preparedness for a possible biological attack.

• Various biological agents may be used during a biological attack. Although scientists have yet to develop vaccines for all bacteria, viruses, and toxins that may potentially be used in a biological attack, infection from some, such as anthrax and smallpox may be prevented through immunization. Speak to your doctor about immunization and always ensure that your immunizations remain up to date.

• Studies have shown that HEPA (High Efficiency Particulate Air) filters can prevent most biological agents from entering your house. Talk to a furnace technician about having a HEPA air filters installed in your central heating or cooling system. You can also purchase portable HEPA filtration devices if installing a filter in your furnace is not an option.

• Although a biological attack may very well come without any advance warning, once the attack is waged, local and national news agencies will likely provide up to the minute coverage of the event. The CDC and HHS offer instructions on what to do in the event of a biological attack and offer advice on how to avoid contamination. These are also good resources for recent news and information on the latest vaccines and other measures you can take to minimize the risk of potential infection following a biological attack.