Key Facts
• June 23–29: 3,353 pertussis cases reported, the highest weekly count ever.
• 2025 cumulative cases: 39,672, 2.4 times higher than the 2019 record.
• Pertussis is a severe respiratory infection, especially dangerous for newborns.
• Infants face high risk of severe complications, with six deaths reported since 2024.
• Transmission occurs via droplets from coughing or sneezing, often within households.
• Preventative measures include vaccination, mask-wearing, and handwashing.
Summary
Pertussis, a highly contagious respiratory infection, has reached unprecedented levels in Japan. From June 23 to 29, 3,353 cases were reported, marking the highest weekly count since record-keeping began in 2018. The total number of cases in 2025 has surged to 39,672, more than doubling the previous peak in 2019. Infants are particularly vulnerable, with severe complications and fatalities reported. Experts emphasize the importance of vaccination and hygiene practices, such as mask-wearing and handwashing, to curb the spread of the disease. Household transmission remains a significant concern, especially for newborns.
