71.   The substance, derived from the blood of people who recently received the smallpox vaccine, can also be used to treat extreme reactions in healthy people.

72.   The smallpox vaccine involves injecting live virus into an individual and prompting the creation of antibodies to maintain immunity.

73.   The smallpox vaccine is a dangerous one and can cause serious problems, including brain damage and death.

74.   The smallpox vaccine is the latest medical product to be stored to protect against biological or chemical attacks.

75.   The standard smallpox vaccine can cause a variety of severe, even fatal, reactions.

76.   Then, two years ago, it answered an ad in a trade magazine to supply smallpox vaccine for a stockpile maintained by the US government.

77.   They included volunteers who had previously received smallpox vaccine and those who had not, in part to determine how many injections might be needed.

78.   Thompson said Acambis had done considerable research on the smallpox vaccine as part of the contract it already held.

79.   Tommy Thompson, the health and human services secretary, said Thursday that he expected production of smallpox vaccine to begin by late November or early December.

80.   Two other large drug companies, GlaxoSmithKline and Aventis Pharma, are also among the companies offering to make smallpox vaccine.