WASHINGTON -- The Bush administration signed a contract Wednesday to buy 155 million doses of smallpox vaccine from a British firm, preparing for the possibility terrorists would try to spread the ...

Dec. 11 -- The administration's smallpox program will not endorse compulsory vaccinations for all Americans, President Bush told ABCNEWS' Barbara Walters. "The need for this government to provide the ...

‘Pre-attack’ plan must account for numerous health risks of vaccine. WASHINGTON — Looming war with Iraq and growing concern over the threat of bioterrorism are moving federal officials to consider ...

An FDA-approved vaccine for smallpox and mpox is effective but causes side effects. The other requires multiple doses. An experimental single-dose vaccine uses the horsepox virus to harness the ...