Definition: Number of reported cases of vaccine-preventable childhood diseases in the total population, by disease (e.g., in 2023, there were 643 cases of pertussis (whooping cough) in California).
Data Source: California Dept. of Public Health, Immunization Branch, Vaccine Preventable Disease Cases by County and Year; U.S. Centers for Disease Control and Prevention, National Notifiable Diseases Surveillance System, Notifiable Infectious Disease Data Tables; California Dept. of Finance, Population Estimates and Projections (Nov. 2024).
Footnote: Data are provided for 11 vaccine-preventable childhood diseases reported by the California Dept. of Public Health and U.S. Centers for Disease Control and Prevention. *Varicella (chickenpox) cases for California and counties include only those resulting in hospitalization or death. Varicella cases for the U.S. include most, but not all, states. The notation S refers to rates that have been suppressed because there were between 1 and 19 cases reported, and to varicella rates that are not comparable with U.S. data. N/A means that data are not available.
