[BrandtMichaels]

Nope. In other words - is this the only successful vaccine for a virus (smallpox)? Would need more than 1 exception to disprove the rule.

[Hiddigeigei]

"In other words - is this the only successful vaccine for a virus (smallpox)?"

No, there are others. Here's a few more:

1885 Pasteur developed the rabies vaccine, a viral disease.

In 1937 Max Theiler, Hugh Smith and Eugen Haagen develop the vaccine against yellow fever, a viral disease. The vaccine is approved in 1938 and over a million people have receive it that year. Theiler was awarded the Nobel Prize.

In 1971 the measles, a viral disease, vaccine (1963) is combined with recently developed vaccines against mumps, a viral disease (1967) and rubella, a viral disease (1969) into a single vaccination by Dr Maurice Hilleman.