herd immunity

Reality Injection: Why California’s Whooping Cough Epidemic is Only Getting Worse

Pertussis continues to spread in California, with 3,458 cases reported between January 1 and June 10: In less than half a year, the toll of the sickened already has exceeded all reported cases for 2013. State health officials have now declared a pertussis epidemic—deeply worrisome, considering the bacterium* poses a particularly dire threat to infants. 

Back with a Vengeance: Berkeley’s Head Epidemiologist On the Return of Pertussis

Professor Arthur Reingold is Head of Epidemiology at UC Berkeley’s School of Public Health

California: Is whooping cough coming back?

We certainly are having a resurgence of pertussis in the United States, although it’s never gone away. It is a threat to very young infants, particularly those too young to be vaccinated or who have not yet had a complete series of the vaccines. 

Where does pertussis come from? How can you catch it?

From the Summer 2014 Apocalypse issue of California.
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