<unk> is a law formulated by Dr. William<unk>  when he made the observation that epidemic events rise and fall in a roughly symmetrical pattern. The time-evolution behavior could be captured by a single mathematical formula that could be approximated by a bell-shaped curve.
Farr's laws
Listing's law
Courvoisier's law
Davis's law
Hy's law
Laura's Law
Baumgarten–Tangl law
Sutton's law