21.   The vaccine was given to servicemen during the Gulf War, and some blamed it for Gulf War Syndrome, a cluster of health problems.

22.   The Wistar polio vaccine was also given to a small number of Swedes.

23.   There are also worries about giving the vaccine to smokers.

24.   Those two vaccines are routinely given in rich countries, and rarely in the developing world.

25.   This vaccine is now given to military personnel, but its effectiveness against inhaled anthrax has been questioned.

26.   Until recently, only members of the military were given the vaccine.

27.   Vaccine should be given to the elderly and chronically ill first, he stressed.

28.   While the infectious-disease vaccines are routinely given to military personnel and civilians, vaccines against anthrax and botulism are less widespread.

29.   Pentagon gave unlicensed vaccine to Gulf War soldiers.

30.   A later decision to give the vaccine to all U.S. military personnel has provoked controversy, with some resisting the vaccinations.