For the sake of simplicity, we assumed in our work that the whole population was susceptible to variola virus.
The failure to deal consistently and clearly between smallpox/variola (the disease) and smallpox/variola virus (its cause) requires many paragraphs to be re-read.
The experimental transformation of variola to vaccinia.
There is no doubt that protection against such distressing complaints as variola and whooping cough are essential, certainly as regards the latter.
The disease confirmed is variola minor, a mild form of smallpox.
Is not this particular type of disease known as variola minor?
The case-fatality rate for variola minor is 1% or less.
Negri went on, however, to demonstrate in 1906 that the smallpox vaccine, then known as vaccine virus, or variola vaccinae, was also a filterable virus.
