In January 1978, a boarding school hosting N = 763 boys in northern England had an outbreak of influenza H1N1. For details see
Influenza in a boarding school, British Medical Journal, 4 March 1978.
You can find the temporal prevalence data in the file british_boarding_school.txt. The data was extracted from the original figure using EasyNData and is hence not exact.
Using the program boarding.py one can fit an SIR-system to the data using a transmission rate 1.66/day and a recovery rate of 1/(2.2 days) as described in
Modeling Infectious Diseases in Humans and Animals, Matt J. Keeling & Pejman Rohani.