(1) The varicella virus is communicated easily through saliva.(2) First, you can make sure you are up to date on all vaccine-preventable diseases like measles, mumps, rubella, and varicella .(3) Unlike varicella , herpes zoster is a sporadic disease with an estimated lifetime incidence of 10 to 20 percent.(4) Although a small percentage of vaccinated children contract varicella each year, these illnesses are much less severe than those occurring in unvaccinated children or adults.(5) Pneumonia is a known complication of rubeola, varicella , and pertussis.(6) Making a clinical diagnosis, and, in particular, differentiating smallpox from varicella , is difficult even when those concerned are seeing both diseases regularly.(7) Alternatively, the faculty might have contagious diseases, such as tuberculosis or varicella , and could infect patients.(8) Later the virus, now known as the varicella zoster virus, was identified and isolated, and the researcher responsible received a Nobel prize.(9) For example chickenpox and shingles are both caused by the same herpes virus - varicella zoster virus.(10) Chickenpox is caused by the varicella zoster virus, and the main symptoms are a high fever and itchy red spots that blister and develop a crust.