Varicella
Onset: 7–42 days
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Disseminated varicella vaccine-strain viral disease (strain testing not done or inconclusive)
What this is
Disseminated varicella vaccine-strain viral disease happens when the weakened chickenpox virus used in the vaccine spreads beyond the area where the shot was given and causes illness.
This can include a widespread chickenpox-like rash or disease affecting another part of the body, such as an internal organ.
If an organ other than the skin is affected, doctors must show that the virus is actually causing disease in that organ, not just that a lab test is slightly abnormal.
If the virus is not found in the affected organ, all symptoms must be part of the same illness occurring at the same time.
If testing shows that the illness was caused by the normal (wild-type) chickenpox virus or another virus, it does not qualify as a vaccine-strain viral disease.
If testing cannot determine which strain caused the illness, symptoms must begin between 7 and 42 days after vaccination to qualify.