1.   Acambis is the only company in the world licensed to make the vaccine.

2.   Flu vaccine fell into short supply this year when the four manufacturers licensed to make it had difficulties growing one of three flu strains.

3.   Only one company, BioPort of Lansing, Mich., is licensed to make anthrax vaccine.

4.   Only six companies have been licensed to make merchandise.

5.   Others licensed to make Mac clones are Power Computing Corp. and Radius Inc., both of the San Francisco area, and Japanese-owned Pioneer Electronics Corp.