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.
List of U.S. states and territories by population. As of April 1, 2010, the date of the 2010 United States Census, the nine most populous U.S. states contain slightly more than half of the total population. The 25 least populous states contain less than one-sixth of the total population. California, the most populous state, contains more people than the 21 least populous states combined, and Wyoming is the least populous state, with a population less than the 31 most populous U.S. cities.