Urinary tract infections are not contagious because they are a series of infections that occur after the bacteria in the body migrate and invade the body through the urinary tract after the decline in one’s own health and immunity. There are several cases of infection, for example, the most common is respiratory infection, the urinary tract and the respiratory tract are far away, so it will not be transmitted through the respiratory tract. For patients with urinary tract infections, although intercourse is a close contact, it is also generally not easily transmitted. If the body resistance is high, it will not be infectious; if the resistance is low, there is a possibility that your own bacteria will migrate and infection will occur. Blood-borne transmission means that there should be a breach in the patient’s body, and bacteria enter the body through the entrance of the breach to cause infection. If you do not have close contact with the infected person and there is no breach, you will not be infected through this route.