Problem with this scenario is that once unleashed, there is no stopping the spread of the viral illness. There is significant risk of wiping out a huge number of people, including those the terrorist represents.<br>The other consideration is that viruses this virulent are very dangerous to work with. Once infected, but before travelling, the terrorist may well infect his buddies or countrymen prior to visiting his target.<br>The thinking is that viruses are not a likely threat.<br><br>Jeffery S. Anderson, M.D.<br><br>