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During the Muslim holy month of Ramadan, Muslims are not supposed to eat or drink anything all day. This is called fasting. People with diabetes can become sick when they fast. Now, Senegal has become the first French-speaking country in Africa to use a wireless phone application called mRamadan. The new application, or app, sends free text messages every day with fasting advice for diabetics. There are exceptions to the rules about fasting during Ramadan. The very young and old do not have to fast. Pregnant women and people with poor health often are permitted to eat during the day. But many diabetics say they do try to fast during Ramadan. They also sometimes stop taking insulin, a medicine used to control blood sugar levels. Some of the mRamadon messages remind people to drink at least one liter of water each morning before beginning the fast. Other messages tell how to make changes to medication use. The advice also advises diabetics not to eat too many sugary foods during the breaks in fasting. Dr. Maimouna Ndour Mbaye studies diabetes at the Marc Sankale National Diabetes Center in Senegal’s capital, Dakar. She says diabetics can face a number of problems while fasting, especially hypoglycemia. Dr. Mbaye says diabetics also have increased risk of dehydration, a sickness caused by a severe lack of water. She says that all diabetics should talk to their doctors before fasting. The mRamadan app is part of the “Be Healthy Be Mobile” campaign from the World Health Organization and the International Telecommunication Union.