Whooping Cough Cases Surge Across the U.S. as Vaccination Rates Fall
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Rates of pertussis,also known as whooping cough,are surging in Texas,Florida,California,Oregon,and other states and localities across the country.
The outbreaks are fueled by falling vaccination rates, fading immunity, and delays in public health tracking systems, according to interviews wiht state and federal health officials. babies too young to be fully vaccinated are most at risk.
“Pertussis cases increase in a cyclical fashion driven by waning immunity, but the size of the outbreak and the potential for severe outcomes in children who cannot be vaccinated can be mitigated by high coverage and good communication to folks at risk,” said Demetre Daskalakis, a former head of the Centers for Disease Control and Prevention (CDC) immunization program, who resigned in August.
Before the first pertussis vaccine became available in the early 1900s, whooping cough was one of the most common childhood diseases and a major cause of childhood death in the United States. Today, children get a series of dtap shots (full-dose version) starting at 2 months old, and teens and adults receive a Tdap booster (lower-dose version) every 10 years.(Both vaccines target diphtheria and tetanus along with pertussis.)
Until recently, 8 in 10 toddlers had received 4 doses of the DTaP vaccine by age 2, and case rates were controlled. But vaccine coverage has declined as the COVID pandemic, and increases in state nonmedical exemptions have widened immunity gaps, which is when the proportion of individuals who are immune falls below the level needed to contain spread.
Texas logged 1928 pertussis cases in 2024. By October 2025, the state had exceeded 3500. National numbers are just as stark: In the first 3 months of 2025, the US tallied 6600 cases – 4 times last year’s pace and 25 times 2023’s. Several states are posting their highest case totals in a decade, and outbreaks from Louisiana to South Dakota to Idaho make clear this surge isn’t regional. It’s everywhere.
Key Factors Behind These Numbers
Texas lawmakers recently passed a law that made it easier for parents to claim nonmedical exemptions from school vaccine requirements by allowing them to download exemption forms online. These
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Pertussis (Whooping Cough): A Extensive Guide
Pertussis, commonly known as whooping cough, is a highly contagious respiratory disease. It’s caused by the bacterium Bordetella pertussis and is characterized by severe coughing fits followed by a “whooping” sound when the person breathes in. While preventable through vaccination, pertussis remains a significant public health concern, particularly among infants.
How Pertussis Spreads
pertussis spreads through respiratory droplets produced when an infected person coughs or sneezes. It’s incredibly contagious, and close contact, like being in the same household, significantly increases the risk of transmission. The illness typically begins with symptoms similar to a common cold, making early detection challenging.
Symptoms of Pertussis
The course of pertussis typically unfolds in three stages:
- Catarrhal Stage (1-2 weeks): Mild, cold-like symptoms such as runny nose, low-grade fever, and a mild cough. This stage is highly contagious, but symptoms are frequently enough mistaken for a common cold.
- paroxysmal Stage (2-6 weeks or longer): Severe coughing fits (paroxysms) that end with a characteristic “whoop” sound. These fits can be exhausting and may be followed by vomiting. Not all individuals, especially infants, will exhibit the classic whoop.
- Convalescent Stage (Weeks to months): Gradual betterment in coughing,but the cough may linger for weeks or months.
Infants are particularly vulnerable and may not exhibit the typical whooping sound. They may experiance apnea (pauses in breathing) instead, which can be life-threatening.
Diagnosis of Pertussis
Diagnosing pertussis can be challenging,especially in the catarrhal stage. Doctors typically diagnose pertussis based on symptoms and laboratory tests.A nasopharyngeal swab is used to collect a sample to test for the Bordetella pertussis bacteria. PCR (polymerase chain reaction) tests are often used for rapid detection.
Treatment Options
Early treatment with antibiotics is crucial to reduce the severity and spread of pertussis.The preferred treatment involves macrolide antibiotics, such as erythromycin, azithromycin,and clarithromycin. These drugs work best early in the illness and help stop spread. Another drug, trimethoprim-sulfamethoxazole, is an option for some older infants and adults.
Antibiotic Resistance
Macrolide-resistant pertussis has become common abroad, especially in China, and recent reports show resistance rising in Peru. In the US, resistant cases have been rare. CDC officials warn that resistant strains could spread, highlighting the importance of monitoring and appropriate antibiotic use.
Prevention: The Importance of Vaccination
Vaccination is the most effective way to prevent pertussis.The DTaP vaccine (diphtheria,tetanus,and acellular pertussis) is recommended for infants and children. A tdap booster is recommended for adolescents and adults, especially those who will have close contact with infants.