How can? After completion of the fasting usually Muslims will perform the tradition of mudik. Well, during the travel this much risk exposure to dirty air and the viruses and bacteria that are strewn in the streets. Not to mention if you ride public transportation, should be more vigilant.
The habit of keeping a diet during fasting should not be abandoned. We should still consume a balanced nutritious diet, fibrous, and many white water. If not so, healthy lifestyle during the month of fasting would be useless.