Health officials in Columbus are issuing a new advisory this week as a highly contagious respiratory illness begins to spike across the Buckeye State, complicating an already intense winter viral season.
While many Ohioans are focused on the fluctuating flu numbers, doctors are urging families to be on high alert for Pertussis (Whooping Cough)—commonly known as the “100-Day Cough” due to its lingering and exhausting nature.
According to data released by the Ohio Department of Health this week, the state is experiencing a significant “post-holiday surge” in cases. The outbreak, which began in localized clusters in December, has now spread to major metropolitan areas, with pediatric hospitalizations seeing a slight uptick.
The Hotspots: Where is it Spreading?
The infection is tracking closely with population density and school districts. Health officials have identified the following counties as “high transmission” zones:
- Franklin County: The Columbus area is currently the epicenter, with school nurses in Dublin and Westerville reporting high rates of absenteeism due to persistent coughing.
- Cuyahoga County: Hospitals in the Cleveland metro area are flagging a rise in cases, particularly among teenagers and young adults.
- Hamilton County: The Cincinnati area is seeing a “southern surge,” with clusters identified in suburbs along the I-71 corridor.
- Montgomery County: Urgent care centers in the Dayton area report that patients arriving with “severe coughing fits” are testing positive for Pertussis at higher rates than last month.
Pediatric specialists at Nationwide Children’s Hospital and Cleveland Clinic are advising parents to be vigilant, as early treatment is crucial for preventing severe illness in young children.
Is it a Cold, the Flu, or the ‘100-Day Cough’?
The “100-Day Cough” is deceptive because it starts exactly like a common cold. This “silent spreading” phase allows the bacteria to move through families and classrooms before anyone realizes it isn’t just a runny nose.
Here is how to distinguish the “100-Day Cough” from other viruses circulating in Ohio right now:
| Symptom | The ‘100-Day Cough’ (Pertussis) | 2026 Flu Strain |
| Cough Type | Violent, uncontrollable fits; may end with a “whoop” sound or vomiting. | Dry, steady cough. |
| Duration | Long (Lasts 2 to 12 weeks). | Short (Lasts 5 to 7 days). |
| Fever | Usually mild (low-grade) or no fever at all. | High fever (100°F+) that hits suddenly. |
| Key Sign | You often feel fine between coughing fits. | You feel exhausted and achy all the time. |
Warning for Parents: Infants are the most vulnerable. They may not “whoop” at all. Instead, watch for them turning red or blue during a cough, or if they seem to stop breathing (apnea). This requires immediate emergency care.
Why is This Happening Now?
Ohio health experts point to a combination of “immunity gaps” and seasonal behavior.
- Waning Protection: The Tdap vaccine (which protects against Pertussis) loses effectiveness after about 10 years. Many Ohio adults have not had a booster since high school.
- Indoor Gathering: The cold January weather has kept everyone indoors, creating the perfect environment for the bacteria to spread in schools and workplaces.
The Action Plan: What to Do Today
- Check Your Vaccine History: If it has been more than 10 years since your last Tdap shot, you are likely unprotected. Pharmacies like CVS, Walgreens, and Kroger across the state have confirmed supplies of the booster.
- The “Vomit” Test: If you or your child is coughing so hard that it causes gagging or vomiting, do not send them to school or work. Ask your doctor for a PCR test for Pertussis specifically.
- Cocoon the Vulnerable: If you have a baby at home or an immunocompromised relative, ensure that anyone who visits them has been boosted recently. This “cocooning” strategy is vital to preventing hospitalization in infants.
Stay safe, Ohio. Share this alert with neighbors and family members in Franklin, Cuyahoga, and Hamilton counties to help stop the spread.
Follow Us!