ideo-. a combining form representing idea, in compound words: ideology. Origin of ideo-. ide(a) + -o-.
Smallpox. Smallpox is a disfiguring and potentially deadly infectious disease caused by the Variola major virus. Before smallpox was eradicated, there were two forms of the disease worldwide: Variola major, the deadly disease, and Variola minor, a much milder form.According to some health experts, over the centuries smallpox was responsible for more deaths than all other infectious diseases combined.efore smallpox was eradicated, there were two forms of the disease worldwide: Variola major, the deadly disease, and Variola minor, a much milder form.
Smallpox is a serious, contagious, and sometimes fatal infectious disease that causes a fever and skin rash. There are two clinical forms of smallpox. Variola major is the more severe form, causing a more extensive rash and higher fever.mallpox is a serious, contagious, and sometimes fatal infectious disease that causes a fever and skin rash. There are two clinical forms of smallpox. Variola major is the more severe form, causing a more extensive rash and higher fever.