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Whooping cough is caused by a type of bacteria called Bordetella pertussis, which attack the upper respiratory system and can cause airways to swell, according to the CDC.

The school requires students in seventh grade and above to get their Tdap booster, which provides elevated immunity against tetanus, diphtheria, and pertussis, or whooping cough.

Whooping cough, also known as pertussis, is a contagious respiratory illness, but it is preventable with a common vaccine.

Across California, there were fewer than 300 reported cases of whooping cough, also known as pertussis, all of last year.

Current pertussis vaccines are widely used and effective at preventing whooping cough, caused by the Bordetella pertussis bacteria.