1.   Both vaccines have gone through the first two stages of a three-stage testing system, evaluating safety and immunologic responses.

2.   But it issued a series of recommendations to help make sure that, if there are shortages, the vaccine goes to people most in need.

3.   In an emergency, the government could dilute those doses to make the vaccine go further.

4.   Lately, as cancer vaccines have gone into more advanced testing, investors have taken note.

5.   There was no way all the vaccine was going to be delivered on time.

6.   When polio vaccines go bad due to heat exposure, there is no change in appearance.

7.   If the FDA approves distribution, the vaccine will likely go to troops and others at risk for anthrax exposure, including law enforcement and postal workers.