any-to-any architecture that has virtual connections in a switched environment. AT&T defines VPLS as any-to-any Ethernet that can be either metro or long haul. Since Ethernet is an integral part of VPLS, it is important to understand how Ethernet works and can be used within an enterprise network. Ethernet
HIV in America: New York City Was First 'Hub'. Also, the surprising true story of 'Patient Zero'. MedpageToday. The virus that eventually brought HIV/AIDS to light probably arrived in the U.S. in 1970 or 1971, immigrating from Africa though Haiti, researchers said.
The influenza virus was discovered in the early 1930s, and scientists developed a working vaccine by the 1940s, when it was first used on soldiers during World War II. In 1947, Jonas Salk, one of the vaccine's creators, began to develop a polio vaccine, which was perfected and approved in 1955. In 1976, an errant outbreak of swine flu at Fort Dix, New Jersey, caused scientists to worry about a possible pandemic, so President Gerald Ford announced that the federal government would vaccinate the entire U.S. population.