Variola minor and Variola

Variola minor noun - A mild form of smallpox caused by a less virulent form of the virus.

Variola and variola minor are semantically related. In some cases you can use "Variola" instead a noun phrase "Variola minor".

Variola noun - A highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars.

Variola minor and variola are semantically related. Sometimes you can replace phrase "Variola minor" with "Variola", this terms are similar.