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Whooping cough, or pertussis, is making a comeback and a Tennessee medical expert stressed the preventable, highly contagious bacterial infection requires urgent attention.

The Centers for Disease Control and Prevention reported, year-to-date, Tennessee has recorded more than 200 cases, while more than 25,000 cases have been reported nationwide.

Dr. Anthony Flores, professor of pediatrics and director of pediatric infectious diseases at Vanderbilt University Medical Center, said rising cases are largely due to vaccine hesitancy, and taking action now is essential to combat the serious illness.

“I think of our severe cases that we’re seeing here in Tennessee, and nationwide as well, almost all of those severe hospitalized cases are in unvaccinated children,” Flores explained. “I think the lower vaccination rate, kind of the periodicity with which we see whooping cough come back in surges, are contributing to the current numbers we’re seeing.”

Flores noted typical symptoms include a runny nose and low-grade fever, although fever is less prominent. The cough can develop and persist for weeks, becoming particularly bothersome in older children and adults. The name “whooping cough” comes from the severe coughing fits, which cause difficulty breathing, followed by a “whoop” sound as the afflicted person gasps for air.

Flores pointed out that in newborns, especially before they begin receiving their initial vaccinations at 2, 4, and 6 months, their protection relies solely on the antibodies passed to them by the mother during pregnancy.

“In pregnant women, it’s actually recommended that if they haven’t received a booster, that they receive a booster in their third trimester, and that’s again to pass on those antibodies to the newborn baby,” Flores emphasized. “But then what can protect them from severe disease?”

Flores recommended children receive the whooping cough vaccine as part of their routine immunizations. He added as they grow, they get booster shots, and adults receive a different formulation called Tdap every 10 years to maintain immunity. He added it is important to follow a schedule to prevent waning immunity over time.