Legal basis: Article 32 of the Law of People's Republic of China (PRC) on the Prevention and Control of Infectious Diseases. When port, airport, railway disease prevention and control institutions and frontier health and quarantine organs find patients with Class A infectious diseases, pathogen carriers and suspected infectious diseases, they shall immediately report to the disease prevention and control institutions where the frontier port is located or the health administrative departments of local people's governments at or above the county level, and notify each other.