Chikungunya
Chikungunya is a mosquito-borne viral illness known for sudden fever and joint pain that can be severe and sometimes lasts for months.
What chikungunya is
Chikungunya is a viral disease that spreads to people mainly through mosquito bites. It is often grouped with dengue and Zika because the same Aedes mosquitoes can transmit all three, but chikungunya has its own pattern: sudden fever and joint pain are especially prominent.
How mosquitoes spread it
Aedes aegypti and Aedes albopictus mosquitoes can become infected after biting a person who has chikungunya virus in the blood. After the virus multiplies inside the mosquito, later bites can infect other people. These mosquitoes often live close to homes and can bite during the day as well as around dusk.
Symptoms
Symptoms usually include fever and joint pain. People may also have headache, muscle pain, joint swelling, rash, nausea, fatigue, or eye symptoms. The illness is rarely fatal, but the pain can be disabling, and some people continue to have joint pain, stiffness, or swelling long after the first fever passes.
Why joint pain can linger
Chikungunya can trigger inflammation in and around joints. For many people, symptoms improve within days or weeks, but others develop recurrent or persistent pain that resembles inflammatory arthritis. Older adults and people with existing joint disease or medical conditions may have higher risk of prolonged problems.
Diagnosis
Chikungunya can look like dengue, Zika, and other infections, especially in places where several mosquito-borne viruses circulate. Clinicians use symptoms, travel or local exposure, and laboratory tests such as molecular or antibody testing. Timing matters because different tests are useful at different points in the illness.
Treatment
There is no specific antiviral medicine for chikungunya. Care focuses on rest, fluids, fever control, and pain relief. Because early chikungunya can be hard to tell apart from dengue, clinicians may advise avoiding aspirin or other nonsteroidal anti-inflammatory drugs until dengue is ruled out, since dengue can increase bleeding risk.
Vaccination and travel
Chikungunya vaccination guidance has changed as vaccines have become available in some places. In the United States, CDC guidance says vaccination is recommended or considered for selected travelers and laboratory workers based on exposure risk, age, destination, outbreak activity, health status, and contraindications. Most travelers still need mosquito-bite prevention even when vaccination is not advised.
Why it matters
Chikungunya rarely attracts the same attention as diseases with higher death rates, but outbreaks can strain clinics, workplaces, households, and travel systems because joint pain can keep many people from normal activity. Its spread also shows how urban mosquitoes, travel, climate, and housing conditions can reshape infectious-disease risk.
What public health teams watch
Surveillance tracks human cases, travel-associated infections, local mosquito species, outbreak regions, and laboratory confirmation. Prevention campaigns focus on bite avoidance, standing-water removal, neighborhood mosquito control, and timely risk communication when outbreaks occur.