31. What it is : Chicken pox is caused by a virus called varicella , related to the herpes family. 32. The reactivation of the varicella virus in nerves that control pain and sensation often winds up destroying those nerves. 33. Even before the eruption of vesicles, varicella zoster virus can be detected from the skin of the ear. 34. Aciclovir is recommended by the CDC for treatment of Varicella during pregnancy, especially during the second and third trimesters 35. I am not suggesting all children should be vaccinated against varicella zoster, but have you thought about this? 36. They showed that chickenpox ( varicella ) and shingles ( herpes zoster ) are both caused by this virus. 37. Chicken pox, caused by the varicella zoster virus, is contracted by nearly 95 percent of Americans by adulthood. 38. Before the chickenpox, or varicella , vaccine was developed in 1995, about 4 million children developed the disease. 39. The characteristic skin lesions of a varicella zoster virus ( VZV ) infection are called " chickenpox ". 40. The Varicella zoster virus disease ( shingles ) can attack nerves causing numbness instead of pain commonly associated with shingles.