A Pox in Our House is episode 15 of season 1 Full House.
When Stephanie catches the chicken pox, it quickly spreads to Jesse, who thought he already caught it as a child, and Joey, who previously spent his whole life believing that he is actually immune to chicken pox. With an important sportscasting gig where he gets to interview the Golden State Warriors, and maybe play in the game, and a baby who shouldn't get chicken pox, Danny really needs a sitter. Just when Danny is going to give up, D.J. returns home from a slumber party she planned to attend and babysits the family.