<p>An Israeli hospital worker is vaccinated last week.</p>
<p>September 24, 2002 -- WASHINGTON - Federal officials sent states detailed guidelines yesterday for rapidly vaccinating their entire populations against smallpox should the deadly disease return through an act of terrorism.</p>
<p>It's been decades since smallpox was seen in this country and the disease has been eradicated from Earth, so officials would assume that a single case of smallpox means the nation is under attack.</p>