Dengue Fever risk in Shanghai

Dengue fever is a mosquito‑borne viral illness caused by the dengue virus, transmitted primarily by Aedes aegypti and Aedes albopictus mosquitoes. Symptoms include sudden high fever, severe headache, joint and muscle pain, rash, and sometimes bleeding. While Shanghai’s climate is temperate, recent warmer summers and increased urban water storage have created breeding sites for these mosquitoes, raising the local dengue risk to a moderate level (score 50/100). Specific risk factors in the city include stagnant water in flower pots, rooftop containers, discarded tires, and poorly maintained drainage systems, especially in densely populated districts where construction sites and older residential areas collect rainwater.

To reduce your risk of dengue in Shanghai, follow these practical steps:

1. Eliminate standing water around your home and workplace at least once a week – empty, cover, or turn over containers such as buckets, plant saucers, and water barrels.
2. Use mosquito repellent containing DEET, picaridin, or oil of lemon eucalyptus on exposed skin and reapply according to label directions, especially during dawn and dusk when Aedes mosquitoes are most active.
3. Install or repair screens on windows and doors, and consider using bed nets if you sleep in areas without adequate screening.
4. Wear long‑sleeved shirts and long pants when outdoors in high‑risk zones, opting for light‑colored clothing that is less attractive to mosquitoes.
5. Participate in community clean‑up campaigns and report any persistent water accumulation or suspected mosquito breeding sites to local health or sanitation authorities for prompt treatment.

By consistently applying these measures, you can significantly lower your chances of contracting dengue fever in Shanghai.