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  • Dengue
  • Vaccine Safety

Is syncope a risk after vaccination with Dengvaxia?

Syncope (fainting) can occur before or after vaccination because of a vasovagal response to needles. Children should be seated or lying down during vaccination. Consider observing patients (with the patient seated or lying) for 15 minutes after vaccination to decrease the risk for injury should the patient faint. If syncope develops, the patient should be observed until the symptoms resolve.

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