Second a word about smallpox. The early statistics-before 1946- are not strictly comparable. Prior to the advent of antibiotics many smallpox deaths resulted from secondary infections. The skin is ruptured by the pox and other germs take over against an already compromised individual. Also pneumonia hits. Many of these secondary infections can be controlled today. The death rate would not be anywhere near the 30 % touted in the media. Remember many people survived the smallpox, including our own George Washington.
Lincoln survived it too. His symptoms started the day after giving the Gettysburg Address.