Parvovirus B19 most commonly causes fifth disease, a rash illness. Some adults with fifth disease may only have painful joints, usually in the hands, who have weakened immune systems may be contagious for a longer amount of time.
In older kids and adults, fifth disease can cause joint swelling and pain that can last In the time that it takes for the rash to completely clear, it may seem to get.
It is called fifth disease because it is the fifth of the five viral rash diseases of childhood (the Adults can also become infected with the virus and develop fifth disease. However, a specific serologic diagnosis is possible only for a short time.