Re: masks to reduce disease transmission.
Everyone is thinking about the bird flu. Bird flu is a lung issue. If you have to take care of a family member with it, they may cough in your face. Even if you are wearing a mouth/nose mask, you can get the disease if it gets into your eyes (mucous membranes). You would really need a pair of safety goggles to go with it. Even a pair from the Dollar Store (the ones with soft framing are more comfortable), with the vent holes covered with clear packaging tape would do. (They would also be okay for dust/smoke and volcanic ash.)
A 3% bleach solution kills the HIV/AIDS viruses, so should be suitable for other viruses as well.
Sue