FDA says that consumer N95 masks are called for in this sort of situation:
In May 2007, FDA cleared for marketing two respirators that can help reduce a person's exposure to airborne germs during a public health medical emergency. Such an emergency can range from a worldwide outbreak (pandemic) of influenza, to a biological terrorist threat such as anthrax.
The two respirators, manufactured by St. Paul, Minn.-based 3M Company (and called the 3M Respirator 8612F and 8670F), will be available to the general public without a prescription.
18:14, 26 April 2009 (UTC)