It is also the most common non-viral sexually transmitted disease in the United States. In the U.S., about 3.7 million people have trichomoniasis, and about 1.1 million more people get infected every year. Recent research has said that 3% of the U.S. population (3 in every 100 people) have trichomoniasis. In people who are at higher risk of getting trichomoniasis, like people with HIV and people in prison, between 7.5% to 32% are infected.