Legal analysis: The NBA Health and Safety Agreement was formulated by the league in response to the new coronavirus epidemic. The main content is that according to the agreement, if someone tests positive for the new coronavirus, they have two ways to return to the team. The first is The first is to be quarantined for 10 days (no training during this period), and the second is that the results of two PCR fluorescence tests (rapid COVID-19 tests) are negative, with at least 24 hours between the two tests. Once a player completes the above steps, he must then conduct 2 days of individual training, other players cannot be present, and the player cannot use the locker room, cannot change clothes, must wear a mask and undergo a heart test.

Legal basis: Article 15 of the "Law of the People's Republic of China on the Prevention and Control of Infectious Diseases" The state implements a planned vaccination system. The health administrative department of the State Council and the health administrative department of the people's governments of provinces, autonomous regions, and municipalities directly under the Central Government shall, based on the needs of infectious disease prevention and control, formulate infectious disease vaccination plans and organize their implementation. Vaccines used for vaccination must meet national quality standards.

The state implements a vaccination certificate system for children. Vaccinations under the National Immunization Program are free. Medical institutions, disease prevention and control institutions and children's guardians should cooperate with each other to ensure that children receive vaccinations in a timely manner. Specific measures shall be formulated by the State Council.