Pertussis data from the California Department of Public Health. The dataset includes the number of cases from the years of 2008 till 2017.
A data frame with variables:
Jurisdiction of California
The year the data was recorded
The number of cases
The number of cases per 100,000 people
https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/Immunization/disease.aspx#