Like many STDs, genital HPV infections often do not have visible signs and symptoms. One study sponsored by the National Institute of Allergy and Infectious Diseases (NIAID) reported that almost half of the women infected with HPV had no obvious symptoms.
Quick Answer. The United States Census splits the country into four regions: northeast, midwest, west and south. Of these regions, as of 2013 the south has the largest total population with more than 118 million inhabitants or 37.4 percent of the country's total population. Continue Reading.
California's Population. California is the most populous state in the nation. With slightly more than 38 million people (according to 2013 estimates), California is the nations most populous stateits population is almost one and a half times that of second-place Texas (26 million). One of every eight U.S. residents lives in California.