People know that some diseases have some symptoms in them but a rash is the biggest common symptom and it possibly starts to infect you around seven to a mostly 21 days before that rash and more symptoms start to develop. There are also some symptoms that last a little bit of days and is non-rash like a fever, headache, and possibly loss of appetite.
Chickenpox can also be transferred to others that has a young age, a parent living with their child, in a school