 [ Symptoms ] really irregular period lasting 12days first was light and past days has been brownish why would it last so long never has before also its very light usually heavy period or just light on the last day no change in routine tho am sexually active he pulls out is there a chance i could be pregnant also my period came early and these last couple of days has been more like spotting any suggestions no insurance right now so any advice would help should i wait it out or buy a pg test [ Disease ] chickenpox is a common childhood skin disease caused by a viral infection the virus involved is called the varicella zoster virus today chickenpox is less common in the united states due to universal vaccination with the varicella virus vaccine though it still occurs in populations that are not routinely vaccinated varicella zoster virus is often categorized with the other common so called viral exanthems viral rashes such as measles rubeola german measles rubella fifth disease parvovirus b19 mumps virus and roseola human herpesvirus 6 but these viruses are unrelated except for their tendency to cause rashes in unimmunized populations most people contract chickenpox by age 15 the majority between ages 5 and 9 but all ages can contract it chickenpox is usually more severe in adults and very young infants than children winter and spring are the most common times of the year for chickenpox to occur