how is rubella transmitted
German measles (rubella) is caused by a highly contagious virus. A patient is contagious in the week before the rash outbreak until two weeks after the rash clears. The virus is spread when you inhale or touch secretions from an infected person.erman measles (rubella) is caused by a highly contagious virus. A patient is contagious in the week before the rash outbreak until two weeks after the rash clears. The virus is spread when you inhale or touch secretions from an infected person.