April 30 – Swiss mathematicianDaniel Bernoulli presents a paper at theFrench Academy of Sciences inParis in which "a mathematical model was used for the first time to study the population dynamics of infectious disease."[2]
^Roberts, Charles (2011).Ordinary Differential Equations: Applications, Models, and Computing. CRC Press. pp. 139–140.
^Singy, Patrick (2003). "Friction of the Genitals and Secularization of Morality".Journal of the History of Sexuality.12:345–64.doi:10.1353/sex.2004.0015.JSTOR3704892.