Most HPV infections don't lead to cancer. But some types of genital HPV can cause cancer of the lower part of the uterus that connects to the vagina (cervix). Other types of cancers, including cancers of the anus, penis, vagina, vulva and back of the throat (oropharyngeal), have been linked to HPV infection.
USA has 50 states since 1959. The flag has 50 stars, one for each state. The District of Columbia is a federal district, not a state. Many lists include DC and Puerto Rico, which makes for 52 states and other jurisdictions.
The current official U.S. flag is a 50 star flag, born of the need for a more practical design to accommodate new states entering the union. On April 4, 1818, Congress established the number of stripes at seven red and six white, and provided the addition of one star for each new state. The thirteen stripes represent the original 13 colonies. The 50 star flag has been in use since July 4, 1960 when Hawaii officially joined the union. In the first years of the Revolutionary War, America fought under many flags.