Doctor said that my baby might have fifth disease. So what is fifth disease?

Fifth disease. Fifth disease is caused by a virus, parvo virus b14, the rash starts from the face giving appearance of slapped face and then spreads to other parts. It may start with cold like symptoms before rash appears. The rash spares palms and hands, and soles of the feet. The rash completely clears without any treatment in 1 to 3 weeks.