A chickenpox vaccine is now available. Most doctors recommend this vaccine for all children who haven't had chickenpox. It can be given at any time after 12 months of age. Children up to 12 years old need just a single injection. Two injections 4 to 8 weeks apart are recommended for adolescents over 12 years and adults who have never had chickenpox.

Call your child's doctor IMMEDIATELY if:

• Some chickenpox sores look infected (yellow pus, spreading redness, red streaks).
• Your child develops a speckled, red rash.
• Your child starts acting very sick.

Call within 24 hours if:

• A scab looks infected (becomes larger or drains pus). Note: Use an antibiotic ointment on these sores until your child is seen by a healthcare provider.
• The fever lasts over 4 days.
• The itching is severe and doesn't respond to treatment.
• You have other concerns or questions. If you take your child to a doctor's office, call ahead to let the staff know that you think your child has chickenpox.