If one tells you that Rubella is a dangerous infection caused by the rubella virus, it might tell nothing to the person who is not involved in medicine. This health condition is worth your attention, especially if you are a potential parent or young parent. Unfortunately, it is one of those diseases, which can seriously harm the child’s health. To specify, the unborn child’s health condition. Doctors sometimes call this phenomenon a German measles. It is also known as a 3-day measles.