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WHO statement on reported clusters of respiratory illness in children in northern China - 22 November 2023

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On 21 November, media and ProMED reported clusters of undiagnosed pneumonia in children in northern China. It is unclear if these are associated with the overall increase in respiratory infections previously reported by Chinese authorities, or separate events.

On 22 November, WHO requested additional epidemiologic and clinical information, as well as laboratory results from these reported clusters among children, through the International Health Regulations mechanism. We have also requested further information about recent trends in the circulation of known pathogens including influenza, SARS-CoV-2, RSV and mycoplasma pneumoniae, and the current burden on health care systems. WHO is also in contact with clinicians and scientists through our existing technical partnerships and networks in China.

Since mid-October, northern China has reported an increase in influenza-like illness compared to the same period in the previous three years. China has systems in place to capture information on trends in influenza, influenza-like illnesses, RSV and SARS-CoV-2, and reports to platforms such as the Global Influenza Surveillance and Response System.

While WHO seeks this additional information, we recommend that people in China follow measures to reduce the risk of respiratory illness, which include recommended vaccination; keeping distance from people who are ill; staying home when ill; getting tested and medical care as needed; wearing masks as appropriate; ensuring good ventilation; and regular hand-washing.

WHO will continue to provide updates.