Given the increased concern over contagious diseases and viruses spread by various host animals and insects (such as the West Nile virus), these maps provided by the USGS are both helpful in their pragmatic applications, and for those studying the spatial distribution of the West Nile virus. The Web site begins with a brief background essay on the history of the virus, how the virus is...

Along with groups such as the United Nations and the Bill and Melinda Gates Foundation, the World Health Organization's Child and Adolescent Health and Development (CAH) division is concerned with the health and well-being of those who range in age from the newly born to age nineteen. It is, as they point out on their website, a rather large group of individuals, and all told, it comprises...