The Guam Department of Public Health and Social Services has confirmed one new laboratory-confirmed case of pertussis, bringing the island’s total to four cases so far in 2026.

Public health officials said epidemiologic investigation and contact tracing have been initiated to determine the source of exposure. DPHSS continues to monitor respiratory illness trends across Guam.

Pertussis, commonly known as whooping cough, is a highly contagious respiratory infection caused by the bacteria Bordetella pertussis. It is vaccine-preventable and can cause severe coughing fits lasting up to 10 weeks or more, often followed by a high-pitched “whoop” sound when breathing in. Vomiting and exhaustion may occur after coughing episodes.

Health officials warn that pertussis can lead to serious complications, particularly in infants, including pneumonia, dehydration, seizures and brain damage. Some infants may not cough but instead experience apnea, or life-threatening pauses in breathing.

DPHSS is urging residents to ensure they are up to date on recommended vaccinations, following guidance from the Centers for Disease Control and Prevention.

The DTaP vaccine is recommended for children under 7 years old in a five-dose series at 2, 4, 6, and 15-18 months, and 4-6 years. The Tdap vaccine is recommended for adolescents at age 11-12, adults who have not previously received a dose, and during each pregnancy, preferably between 27-36 weeks gestation.

Vaccines funded through DPHSS’ Vaccines for Children program are available to eligible children 18 years and younger who are uninsured, enrolled in Medicaid or underinsured. Appointments can be scheduled at the Northern Region Community Health Center at 671-635-7412 or the Southern Region Community Health Center at 671-828-7511. Additional information is available through the Bureau of Family Health and Nursing Services at 671-634-7408.

Residents experiencing flu- or pertussis-like symptoms are encouraged to contact their primary care provider.