Chikungunya

What is chikungunya?

Aedes aegypti mosquito

Chikungunya virus is spread to people by the bite of an infected mosquito. Mosquitoes become infected when they feed on a person already infected with the virus. Infected mosquitoes can then spread the virus to other people through bites.

Symptoms usually begin 3–7 days after being bitten by an infected mosquito. The most common symptoms of chikungunya are fever and joint pain. Other symptoms include headache, muscle pain, joint swelling, or rash. Most people feel better within a week. In some people the joint pain may persist for months.

Who is at risk?

The mosquitoes that spread chikungunya virus are found in many countries throughout the world. Travelers going to countries in Africa, Asia, the Americas, and islands in the Indian and Pacific Oceans might be at risk for infection.

Mosquitoes that spread chikungunya bite during the day and at night.

What can travelers do to prevent chikungunya?

There are no vaccines or medicines that prevent chikungunya. Travelers can protect themselves against infection by taking the following steps.

Use insect repellent

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  • Use Environmental Protection Agency (EPA)-registered insect repellents with one of the active ingredients below. When used as directed, EPA-registered insect repellents are proven safe and effective, even for pregnant and breastfeeding women.
    • DEET
    • Picaridin (known as KBR 3023 and icaridin outside the US)
    • IR3535
    • Oil of lemon eucalyptus (OLE)
    • Para-menthane-diol (PMD)
    • 2-undecanone

Find the right insect repellent for you by using EPA's search tool.

graphic: putting repellent on child

  • Insect repellent tips for babies and children
    • Dress your child in clothing that covers arms and legs.
    • Cover strollers and baby carriers with mosquito netting.
    • When using insect repellent on your child:
      • Always follow label instructions.
      • Do not use products containing oil of lemon eucalyptus (OLE) or para-menthane-diol (PMD) on children under 3 years old.
      • Do not apply insect repellent to a child’s hands, eyes, mouth, cuts, or irritated skin.
        • Adults: Spray insect repellent onto your hands and then apply to a child’s face.

Wear long-sleeved shirts and long pants

Treat clothing and gear with permethrin

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  • Use 0.5% permethrin to treat clothing and gear (such as boots, pants, socks, and tents) or buy permethrin-treated clothing and gear.
    • Permethrin is an insecticide that kills or repels mosquitoes.
    • Permethrin-treated clothing provides protection after multiple washings..
    • Read product information to find out how long the protection will last.
  • If treating items yourself, follow the product instructions.
  • Do not use permethrin products directly on skin.
  • Watch the video What You Need to Know About Permethrin.

Keep mosquitoes out of your hotel room or lodging

  • Choose a hotel or lodging with air conditioning or window and door screens.
  • Use a mosquito net if you are unable to stay in a place with air conditioning or window and door screens or if you are sleeping outside.

Sleep under a mosquito net

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  • Sleep under a mosquito net if you are outside or when screened rooms are not available. Mosquitoes can live indoors and bite during the day and night.
  • Buy a mosquito net at your local outdoor store or online before traveling overseas.
  • Choose a mosquito net that is compact, white, rectangular, with 156 holes per square inch, and long enough to tuck under the mattress.
  • Permethrin-treated mosquito nets provide more protection than untreated nets.
    • Permethrin is an insecticide that kills mosquitoes and other insects.
    • To determine if you can wash a treated mosquito net, follow the label instructions.

If you are bitten by mosquitoes, avoid scratching the bites and apply over-the-counter anti-itch or antihistamine cream to relieve itching. See Mosquito Bite Symptoms and Treatment.

stethoscope

If you traveled and feel sick, particularly if you have a fever, talk to a healthcare provider and tell them about your travel. Avoid contact with other people while you are sick.

If you need medical care abroad, see Getting Health Care Abroad.

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