Fifth disease is a mild rash illness caused by parvovirus B This disease is usually not a problem for pregnant women and their babies. About half of pregnant women are immune to parvovirus B19, so they and their babies are usually protected from getting the virus and fifth disease. Pregnant women who are not immune usually have only mild illness if they are exposed to fifth disease.
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Fifth disease is a common illness. It is seen more often in children, but adults can get it, too. It is a condition that can cause a rash along with cold or flu-like symptoms. It is usually mild and not dangerous to those in good health.
Back to Pregnancy. There's no evidence that catching scarlet fever during your pregnancy will put your baby at risk. However, if you are infected when you give birth, there is a risk your baby may also become infected.
JOHN W. ELY, M. See related patient information handout on respiratory infections during pregnancy , written by the authors of this article.