duty. 1  something that one is expected or required to do by moral or legal obligation. 2  the binding or obligatory force of something that is morally or legally right; moral or legal obligation. 3  an action or task required by a person's position or occupation; function: the duties of a clergyman.
Familial Mediterranean fever is an inherited disorder that usually occurs in people of Mediterranean origin â including Sephardic Jews, Arabs, Greeks, Italians, Armenians and Turks. But it may affect any ethnic group. Familial Mediterranean fever is typically diagnosed during childhood. While there's no cure for this disorder, you may be able to relieve signs and symptoms of familial Mediterranean fever â or even prevent them altogether â by sticking to your treatment plan. 1  Symptoms.
Fifth disease is a mild rash illness caused by parvovirus B19. 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. Also, their babies usually do not have any problems.