India, Oct. 20 -- Millions of people around the world stutter. Despite widespread therapy options and extensive research, we still can't nail down exactly where this condition begins. Berlin (dpa) - Around 1% of people make calls, socialize and join meetings with it. Stuttering is common, and yet the precise genetic cause remains elusive. Here are the key questions and answers for World Stuttering Awareness Day on October 22: What is stuttering? Stuttering is a speech fluency disorder. People who stutter know exactly what they want to say but cannot express it fluently in the moment. In many countries, stuttering is recognised as a disability, and affected children can apply for accommodations in school. There are three main types of stutte...