1.   It never occurred to us that the Pilgrims were robbers and land thieves spreading smallpox around the world.

2.   People can spread smallpox only while the rash is present.

3.   Smallpox is spread through face-to-face contact by inhaling droplets of the virus.

4.   There was evidence during the war, taken seriously by Washington, that the British were deliberately spreading smallpox to American troops.

5.   The fear that terrorists could spread smallpox, thought to have killed more people than any other infection in human history, has added to those anxieties.

6.   Unlike anthrax, smallpox is easily spread from person to person and federal officials are rushing to stockpile enough vaccine to inoculate millions of Americans if necessary.