Chikungunya is a virus transmitted by the bite of an infected
mosquito. It has been found in many parts of the world, including
recently the Caribbean, South and Central America, and North
What are the signs and symptoms of chikungunya?
Symptoms of chikungunya usually begin 3-7 days after infection,
and include fever, severe joint pain, headache, muscle pain,
joint swelling, or rash. Chikungunya is not usually fatal, but
may cause severe pain and discomfort.
How can I get chikungunya?
Chikungunya is transmitted through the bite of an infected
Can I get chikungunya in San Mateo County?
Chikungunya is not currently present among mosquitoes in San
Mateo County. However, a species of mosquito capable of
transmitting chikungunya, Aedes aegypti, has been found
in San Mateo County recently. Local mosquitoes could become
infected by feeding on someone with an active case of
chikungunya. For this reason, the District works closely with the
County Health Department on all mosquito-borne disease cases.
When a mosquito-borne disease is detected in a patient in
San Mateo County, the health department notifies the District.
District staff will then conduct mosquito surveillance in the
area to ensure that vector mosquitoes are kept at very low
What can I do if i am traveling to a country that has
There is currently no vaccine or medication to prevent infection
with chikungunya. Travelers are advised to avoid mosquito bites.
For information on protecting yourself from mosquito bites, see
What You Can Do: