This vaccine is used to prevent disease caused by the chikungunya virus in adults that are at high risk of coming into contact with the virus.

This vaccine will not treat an active infection that has already developed in the body, and will not protect against other diseases transmitted by mosquitoes.

Like any vaccine, the chikungunya vaccine may not provide protection from disease in every person.

You should not use chikungunya vaccine if you are allergic to it or its ingredients, or if you have a weak immune system (caused by disease or by using certain medicines).

Tell your doctor if you have or have ever had:

• a bleeding or blood clotting disorder such as hemophilia;
• an allergic reaction to any vaccine;
• any other medical condition; or
• any illness with a fever above 100.5 degrees F (38.0 °C).

Tell your doctor if you are pregnant or plan to become pregnant. Your doctor should determine whether you need this vaccine, especially if you have a high risk of infection with chikungunya. Having chikungunya during pregnancy may cause complications or medical problems in the baby.

If you are pregnant, your name may be listed on a pregnancy registry to track the effects of chikungunya vaccine on the baby.

Tell your baby's doctor if you received chikungunya vaccine during pregnancy, especially within the last 14 days before giving birth. It is not known if the chikungunya vaccine will pass the virus to the baby.

Ask a doctor if it is safe to breastfeed after receiving this vaccine.

Use Chikungunya Vaccine, Live (Cvx 317) (Intramuscular) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Get emergency medical help if you have signs of an allergic reaction: hives, difficult breathing, swelling of your face, lips, tongue, or throat.

Chikungunya vaccine may cause low white blood cell counts. This usually occurs within the first week after receiving the vaccine. Tell your doctor if you have fever, mouth sores, skin sores, sore throat or cough. Your white blood cell counts may return to normal within 1 month.

You may have a severe reaction after receiving the vaccine. Call your doctor at once if you have fever, weakness, tiredness, headache, or severe muscle, back or joint pain. These symptoms may prevent you from daily activities, require a hospital stay, or last for weeks or months.

Common side effects may include:

• pain, redness, swelling, or tenderness where the vaccine was injected;
• headache, fever, weakness, tiredness; or
• muscle or joint pain.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.