欧洲疾控中心：百日咳-2023年流行病学年度报告（英文版）

Pertussis is a highly infectious bacterial disease involving the respiratory tract. It is caused by a bacterium (Bordetella pertussis or Bordetella parapertussis) that is found in the mouth, nose and throat of an infected person. It is also known as whooping cough. Symptoms usually appear seven to 10 days after infection, but can also appear up to 21 days later. Initially, symptoms resemble those of a common cold, including sneezing, runny nose, low-grade fever and a mild cough. Within two we