How is Dengvaxia prepared and administered?

Dengvaxia is administered as a 3-dose series, spaced 6 months apart (0, 6, and 12 months). Each dose is 0.5 mL in volume, administered subcutaneously. The vaccine comes in powder form (lyophilized) in single dose vials. Each lyophilized vaccine vial should be mixed with the supplied diluent, a vial of saline diluent (0.4% NaCl). To reconstitute Dengvaxia, withdraw 0.6 ml from the diluent vial and inject it into the lyophilized vaccine vial. Swirl the vial gently. After reconstitution, the suspension is colorless and may develop trace amounts of white to translucent particles.

After reconstitution, 0.5 mL of Dengvaxia should be withdrawn and immediately administered subcutaneously. If not used immediately, the reconstituted vaccine should be refrigerated at 36°F–46°F (2°C–8°C) and used within 30 minutes. Do not use the vaccine more than 30 minutes after reconstitution.

Dengvaxia is for subcutaneous use only. Dengvaxia should not be administered by intramuscular injection; however, if administered intramuscularly in error, the dose does not need to be repeated.

CDC has a web page dedicated to the storage and reconstitution of Dengvaxia: https://www.cdc.gov/dengue/hcp/vaccine/storage-handling.html.