Shingles is caused by the varicella-zoster virus, which is the same virus that causes chickenpox. Therefore, shingles is contagious to people, especially children, who have never been infected with the virus. The virus is primarily transmitted through the respiratory tract. Thus, it is recommended that if someone in the household contracts shingles, particularly in households with children, it is crucial to avoid close contact and to implement appropriate isolation measures. It is also important to keep windows open for ventilation to prevent transmitting the virus to children, who may develop chickenpox, or to some adults who may also be susceptible to chickenpox if they have never been infected with the virus before.