Chinese officials say they did not detect any “unusual or novel diseases” in the country, the World Health Organization said Thursday, following an official request by the U.N. health agency for information about a potentially worrying spike in respiratory illnesses and clusters of pneumonia in children.
WHO cited unspecified media reports and a global infectious disease monitoring service as reporting clusters of undiagnosed pneumonia in children in northern China and formally requested more details from China earlier this week.
Outside scientists said the situation warranted close monitoring, but were not convinced that the recent spike in respiratory illnesses in China signaled the start of a new global outbreak.
The emergence of new flu strains or other viruses capable of triggering pandemics typically starts with undiagnosed clusters of respiratory illness. Both SARS and COVID-19 were first reported as unusual types of pneumonia.
WHO noted that authorities at China’s National Health Commission on Nov. 13 reported an increase in respiratory diseases, which they said was due to the lifting of COVID-19 lockdown restrictions. Other countries also saw a jump in respiratory diseases such as respiratory syncytial virus, or RSV, when pandemic restrictions ended.
WHO said media reports about a week later reported clusters of undiagnosed pneumonia in children in northern China.
The U.N. agency said it held a teleconference with Chinese health officials on Thursday, during which the data it requested were provided. Those showed an increase in hospital admissions of children due to diseases including bacterial infection, RSV, influenza and common cold viruses since October.
“No changes in the disease presentation were reported by the Chinese health authorities,” WHO said. It added that Chinese officials said the spike in patients had not overloaded the country’s hospitals.