Chlamydia is the most common bacterial STD in the US, and the most common reportable STD. You should know that not all STDs are reportable, so the CDC doesn't get direct reports about HPV or trichomonas.
Genital HPV is the most common viral STD. Occurs in both men and women. There are > 40 HPV types that effect the genital area of males and females. Hpv types can also infect the mouth and throat through oral sex. Since Genital HPV is a viral STD it can not be cured.
Trichomoniasis is the most common protozoan STD in the US. Aside from giardia, which is rarely sexually transmitted, it's the only protozoan STD.
Itching
HPV
dengue fever
STD are common in people who are sexually active... if you are sexually active at the age of 20 then you are high risk to have an STD.
STD(mostly)
dengue fever
PCH Trivia = Viral
Nope actually chlamydia and herpes are the more common stds.
The common cold is a viral upper respiratory tract infection which mainly affects the nose. The most common pathogen are rhinoviruses.