Denmark: Elevated pertussis activity reported nationwide, especially Syddanmark Region, through September

Event

Danish health officials have reported elevated pertussis activity across multiple regions, with more than 1,220 cases reported as of Aug. 31. The Southern Region (407 cases) is the most affected, followed by the Capital Region (325 cases), Central Region (318 cases), North Region (99 cases), and Zealand Region (79 cases). Due to the increasing pertussis activity in recent months, Danish health officials reintroduced the pertussis vaccination for pregnant women on Aug. 1. This report represents the most complete data available as of Sept. 11.

Context

Diphtheria, pertussis, and tetanus (DPT) vaccination coverage in Denmark is estimated at 97 percent, which is above the 92-94 percent required to prevent wider community transmission. The most recent epidemics of pertussis in Denmark took place in 2016-2017 and 2019-2020. Danish health officials have reported roughly 80 pertussis cases in 2021, 2,390 cases in 2020, and 3,691 cases in 2019.

Pertussis - also known as "whooping cough" - is a very contagious viral disease that spreads through respiratory droplets created when an infected individual coughs, sneezes, or speaks. Symptoms typically appear 7-10 days after exposure but can develop up to 21 days after exposure. Symptoms range from mild illness with low-grade fever and occasional coughing in the early stage, to vomiting, exhaustion, and severe fits of rapid coughing in the later stage. Infants and children up to 4 years old are at highest risk, and typically suffer the most severe symptoms.

Advice

Visit a doctor to ensure vaccination against pertussis or immunity through previous infection. Practice basic health precautions. Call your medical provider if symptoms develop within three weeks of being in affected areas.