China's disease control authorities have issued a notice warning of rising risks of vector-borne and zoonotic infectious diseases ahead of the May Day holiday and the summer season.

The National Disease Control and Prevention Administration said Monday that reported cases of dengue fever, chikungunya fever and anthrax are trending upward.

The administration said that while acute respiratory infections have dropped to a low level, vigilance remains necessary against possible flare-ups caused by mutations of the novel coronavirus.

It also cautioned that the risk of clusters of intestinal infectious diseases at schools, child care centers and catering facilities has increased with the arrival of summer. Meanwhile, the global spread of malaria, new subtypes of influenza and mpox has raised the risk of imported infections.

The administration said the overall infectious disease situation is expected to remain stable and under control throughout the upcoming five-day May Day holiday, which begins Friday, during the summer season.

It emphasized the importance of routinely collecting and analyzing overseas epidemiological data, assessing potential risks, as well as strengthening mosquito surveillance at ports of entry, and implementing effective control measures to keep mosquito density at safe levels.

Local authorities are required to ensure efficient monitoring of the spread of acute respiratory diseases, including COVID-19 and influenza, and to enable early detection and rapid response to potential outbreaks.

They should also equip medical institutions with sufficient testing kits, medications and equipment for diseases common in summer. More intestinal disease clinics should be opened to meet patient needs.