Chickenpox (also known as Varicella Zoster virus) is contracted by contact with an infected person's saliva, secretions expelled by a sneeze or cough, or by direct contact with an infected person's skin. If you notice any unusual blisters, sores, or a rash on your child, please keep him/her home and call your child's doctor to get it checked out. Chickenpox blisters are usually less than a quarter of an inch wide, have a reddish base, and appear in crops over 2 to 4 days. Some kids have a fever, abdominal pain, sore throat, headache, or a vague sick feeling a day or two before the rash appears. A child with Chickenpox should be kept out of school until all blisters have dried, usually about 1 week. If your child ends up with a confirmed case of Chickenpox, please notify the school.