11.   For many years, the United States has relied primarily on the oral vaccine.

12.   For reasons scientists do not entirely understand, raccoons are immunized by the oral vaccine only when it comes into contact with their tonsils.

13.   If successful, scientists will then try to apply the same techniques on an oral vaccine against tularemia.

14.   In the pilot program, oral vaccines placed inside baits made with fishmeal are scatterred on the ground for raccoons to find.

15.   Kahn is looking for gay men and women to participate in the one-year oral vaccine study.

16.   Laurie Duplease of North Haven, Conn. is critical of the academy for allowing a grace period so remaining supplies of the oral vaccine could be used.

17.   Other initiatives involve using oral vaccines instead of injections and putting vaccines into foods.

18.   Physicians are able to obtain a full refund or credit for the unused oral vaccines, she said.

19.   Salmonella, better known for causing gastrointestinal distress, could prove valuable in developing oral vaccines against anthrax, tularemia and other potential biological weapons.

20.   Skunks and Puerto Rican mongooses, for instance, are not immunized by any existing oral vaccine.