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.
Demographics of United States of America (USA) 2016. As of 1 January 2017, the population of United States of America (USA) was estimated to be 325,457,716 people. This is an increase of 0.75 % (2,432,381 people) compared to population of 323,025,335 the year before.