Generally, after vaccination, if there are no uncomfortable symptoms, the vaccinees can do aerobic exercise, such as jogging and walking, but it is not recommended to play strenuous sports such as basketball and soccer immediately, usually about 3 days after vaccination and without uncomfortable symptoms; in addition, individual vaccinees may have adverse reactions such as low fever, headache and chest tightness after vaccination, at this time the vaccinees need to rest and recuperate. Exercise is not recommended. Playing basketball is strenuous exercise, and strenuous exercise will accelerate blood circulation and metabolism in the body, which may cause excessive fatigue, thus lowering the immunity of the body, affecting the immune effect of the vaccine and increasing the adverse reactions of the vaccine; in addition, strenuous exercise will cause a lot of sweating in the vaccinees, and the sweat will contaminate the injection site, which will easily cause bacterial infections; after sweating more and catching a cold, it is also easy to cause a cold, which will further reduce the immune effect of the vaccine. This will further reduce the immunity of the body, which will affect the effect of the vaccine on the one hand, and increase the chance of adverse reactions to the vaccine on the other hand, and will aggravate the adverse reactions and prolong the recovery time for those who have already had adverse reactions. Therefore, 2-3 days after vaccination, try not to play basketball. If there is no adverse reaction or the adverse reaction has subsided after 3 days, you can gradually resume the sport. At first, you should pay attention to not playing basketball for too long, and pay attention to protecting the injection site from impact or sweat contamination during the process. Also need to pay attention to their physical state, once the discomfort immediately stop, discomfort symptoms are more serious or persistently can not be alleviated need to seek medical treatment.