Chickenpox is an illness caused by the varicella zoster virus. The symptoms include an itchy, spotty rash that turns into blisters, as well as a high temperature, aches and pains, tiredness, a loss of appetite and generally feeling unwell.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/should-your-child-get-the-chickenpox-vaccine