Is hemorrhagic fever highly prevalent?

Generally, the incidence of hemorrhagic fever is related to geographical location and season. In certain regions during specific seasons, cases tend to peak, while in other areas or at different times of the year, the disease occurs less frequently. If you have concerns, it is recommended to seek medical advice in advance. A detailed analysis is as follows:

In northeastern, northwestern, and northern China—regions where rodent activity is common—hemorrhagic fever often peaks during the autumn and winter months (October to January) and again in spring (March to May). During these periods, rodents are highly active and reproduce rapidly, spreading their excretions (such as urine and feces) widely. These contaminants can easily pollute food, water sources, or the environment, increasing the risk of human infection, and localized clusters of cases may occur.

In some southern regions with warm, humid climates or high levels of urbanization, rodent populations are generally lower and effective preventive measures are in place, resulting in consistently low annual incidence rates and rare outbreaks. Additionally, outside of peak rodent activity seasons, transmission routes for the virus diminish across both northern and southern regions, leading to a significant drop in infections and maintaining an overall low incidence level.

To protect yourself, maintain good environmental hygiene and reduce potential rodent habitats. Store food securely to prevent contamination by rodents. In high-risk areas or during peak seasons, consult a healthcare provider about receiving the hemorrhagic fever vaccine to prevent infection.