Regarding blocking drugs for AIDS, it is effective and is more practically used in the clinic. The success rate of blocking drugs is around 70%, but currently, there are no clinical cases of blocking failure. If there is blood or high-risk sexual contact, and the other party is a suspected AIDS patient, or the other party is a clear AIDS patient, once there is intimate contact, it is recommended to go to the local CDC or infectious disease hospital as soon as possible within 24 hours for systematic blockade, and take the medication regularly for 28 days, and conduct HIV antibody testing and monitoring of possible drug toxicities as required. Of course blocking drugs can have certain side effects, if there is only psychological concern and no actual high-risk exposure, it is not recommended to use blocking drugs at this time.