·caused by a virus·edward jenner developed a vaccine  ·considered to be a biological weapon·declared disease eradicated in 1980  the disease isa)hiv/aidsb)measles. c)polio. d)smallpox.

The right answer is D.

Edward Jenner is the first physician to introduce and scientifically study the smallpox vaccine, and is considered the "father of immunology".

Smallpox or smallpox was an infectious disease of viral origin, highly contagious and epidemic, due to a poxvirus. Smallpox was responsible until the eighteenth century for tens of thousands of deaths per year in Europe only.