County health officials are looking into several confirmed cases of whooping cough.
The respiratory infection, formally known as pertussis, ranges from mild to severe in adolescents and adults but can be fatal in infants, according to a news release from the San Luis Obispo County Public Health Department.
Symptoms include a cough of increasing severity lasting more than two weeks and episodes of sudden coughing followed by vomiting. Infants afflicted with the infection may become pale or blue during a coughing episode, officials said.
Treatment includes antibiotics and rest, although infants may need to be hospitalized.
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A pertussis vaccination is recommended for anyone who has close contact with an infant less than a year old. Those vaccines are available at the Public Health Department for $25.