Most cases of whooping cough (pertussis) in California (USA) in 70 years

From Jan. 1 through Nov. 26, there have been 9,935 cases of whooping cough (pertussis) statewide. This is the largest number of cases reported in California in nearly 70 years.

Pertussis cases have increased throughout most of the world due in part to increased virulence and other genetic changes in the circulating strains as well as decreased immunity over time. Outbreaks of pertussis (whooping cough) can occur anywhere in the world at anytime. Travellers can reduce their risk of exposure to this disease by ensuring that their childhood vaccinations and their current immune status for pertussis are up-to-date prior to travelling.

Visit our Health Library for more information on exposure to and the prevention of Whooping Cough.

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