Is there a smallpox vaccine?

Smallpox Vaccine. The American public has not received routine smallpox vaccinations since 1972. According to the CDC “The U.S. government has enough vaccine to vaccinate every person in the United States in the event of a smallpox emergency.” This is part of Emergency Prepared & Response for possible future bioterrorism (in aftermath of 9/11).****
Yes. See www.Bt.Cdc.Gov/agent/smallpox/index.Asp the vaccine is not for general use & at this point the military and some civilian first responders maintain up to date vaccine coverage.
Yes. Yes but due to side effects and the worldwide eradication of the disease, it is not given.