Some of the most vulnerable people to getting the SARS virus are health care providers. The general public, walking in the street, there is really not that much risk at all. It's a very, very low risk - a very, very low risk.
Pneumococcal disease is a real threat. Pneumococcal disease is a bacterial infection that causes anything from middle ear infection to pneumonia to meningitis. Children are particularly vulnerable to it, but adults can get pneumococcal disease themselves.
What we learned from the mail-service anthrax attack of 2001 is that you really have to look at the vulnerable people along the chain of exposure.