HPV51 is a viral infection caused by human papillomavirus, which does not belong to the category of sexually transmitted diseases, but is generally caused by sexual contact more often, and positive means already infected. HPV51 is a viral infection caused by human papillomavirus. In addition, there are more than 140 subtypes of HPV, and 14 high-risk types. Generally, HPV types 16 and 18 are prone to cervical lesions, which can lead to precancerous lesions. Although HPV type 51 has a small chance of causing cancer, it is also a high-risk HPV type, so it is best to have a cervical smear test in time once it is detected.