If the cat’s body is clean and vaccinated, sleeping with the cat for a long time is generally not harmful to people. However, if the cat is not bathed regularly or not vaccinated, sleeping with the cat for a long time may cause some harm. In addition, if you are allergic to cat hair, sleeping with cats can be harmful to people, whether long-term or short-term. 1. No harm: If the cat is often bathed, the cat’s body is clean, there is no ringworm, parasitic infections, etc., and the cat is also vaccinated, even if it sleeps with the cat for a long time, it is generally not harmful to people. 2. If the cat is not clean, such as often taking the cat out to play and not bathing the cat after coming back, and not having vaccinated the cat, then in the process of sleeping with the cat for a long time, there may be cases such as Toxoplasma infection, especially for people with immune deficiency and pregnant women, who are prone to sleeping with the cat for a long time due to Toxoplasma infection with serious consequences, such as the development of Toxoplasma encephalitis. Toxoplasma gondii infection in pregnant women can lead to vertical transmission, resulting in fetal infection and possibly increasing the incidence of fetal malformations. It can also spread fungus and cause ringworm in cats. In addition, if you are allergic to cat hair, an allergic reaction will occur in the short term, while sleeping with cats for a long time may also induce asthma. It should be noted that any bleeding cat scratches or bites should be treated promptly and the rabies vaccine should be administered in a timely manner as prescribed by the doctor to avoid rabies infection.