Cytomegalovirus (CMV) is a prevalent pathogen, with 40 to 100 percent of the general population showing prior exposure by serology.1 Up to 20 percent of children in the United States will have contracted CMV before puberty.
The concept of the Sousaphone was created by the American composer and bandmaster John Philip Sousa, putting it in a category with the Wagner tubaâa horn conceptualized by German composer Richard Wagnerâand the Saxophone, one of the numerous inventions of Belgian instrument maker Adolphe Sax.
A Brief History of the Payphone. Invented by William Gray in 1889, he began selling his devices in 1891. The first payphones were opened to the public, using attendants to collect the money and place the calls for you. The payphone went almost ten years before it finally became a coin-operated model that was largely unattended.