Health officials in the Cayman Islands have confirmed a case of whooping cough at a local high school, prompting advisories to parents and calls for increased vigilance.

The Ministry of Health, Environment and Sustainability and the Public Health Department said letters have been sent to parents of students who may have been exposed, outlining next steps and, where necessary, preventive treatment.

Whooping cough, also known as pertussis, is a highly contagious respiratory illness caused by bacteria. Symptoms typically appear within five to 10 days of exposure, though in some cases they can take up to three weeks to develop.

Early signs often resemble a common cold, including a runny nose, mild fever and occasional cough. However, within one to two weeks, patients may develop severe coughing fits that can persist for several weeks.

Chief Medical Officer Dr Hilary Wolf said health authorities are working closely with the education sector to monitor the situation and limit the spread.

“We have also provided schools with additional information on prevention, monitoring and reporting. At this time, we are asking parents and administrators to remain vigilant and to follow directives issued by us and PHD,” Wolf said.

Medical Officer of Health Dr Samuel Williams-Rodriguez urged parents to ensure vaccinations are up to date, noting that immunisation remains the most effective protection against the disease.

“This is a good time for all parents to check that their children’s vaccinations are up to date,” adds Medical Officer of Health, Dr. Samuel Williams-Rodriguez.

“The DTaP vaccine in infancy and childhood and the Tdap booster vaccine for teens and adults protect against pertussis, so up to date vaccinations are essential in safeguarding children and vulnerable adults in circumstances like this.”

Chief Nursing Officer, Felicia McLean added: “Today marks the beginning of Vaccination Week in the Americas and the launch of the Updated National Childhood and Maternal Immunisation Schedule for the Cayman Islands.”

“Vaccines save lives, and I strongly encourage parents to revisit their children’s immunisation records and to ask questions of their paediatricians or Public Health Officials to ensure that they are up to date. We all have a role to play in ensuring we safeguard our community.”

The illness is generally less severe in older children and adults but can pose serious risks to infants and vulnerable individuals. Officials warned that some babies may not develop a cough, but could instead experience breathing difficulties.

Pregnant women are also being encouraged to receive the recommended vaccine to help protect newborns.

Health officials advised students, staff and families to watch for symptoms such as persistent coughing, coughing fits or vomiting after coughing, and to seek medical advice if symptoms develop.

They also urged the public to practise basic preventive measures, including frequent handwashing, covering coughs and sneezes, and staying home when unwell.

Authorities said they will continue to monitor the situation and provide updates as necessary.