is_manufactured_by vaccine immunization for host bearer_of Homo sapiens Dryvax Product Name: Smallpox Vaccine, Dried, Calf Lymph Type Dryvax is a freeze-dried calf lymph smallpox vaccine. It is the world's oldest smallpox vaccine, created in the late 19th century by American Home Products, a predecessor of Wyeth. By the 1940s, Wyeth was the leading US manufacturer of the vaccine and the only manufacturer by the 1960s. After world health authorities declared smallpox had been eradicated from nature in 1980, Wyeth stopped making the vaccine. Trade Name: Dryvax YH CVX: 75 a vaccinia virus vaccine that is a freeze-dried calf lymph smallpox vaccine, specifically, Dryvax is a live-virus preparation of vaccinia prepared from calf lymph. http://en.wikipedia.org/wiki/Dryvax vaccinia virus vaccine USA licensed vaccine role Wyeth Pharmaceuticals Inc