From the safety point of view, both regular recombinant vaccines and inactivated vaccines meet national safety standards and patients can be vaccinated with confidence. However, there are differences in the production process and vaccination interval between the two vaccines, and both have their own advantages and disadvantages, so vaccinees who meet the indications for vaccination can choose the appropriate vaccine according to their own situation and vaccine characteristics. 1. Recombinant vaccine: Recombinant vaccine is a recombinant product of virus and receptor, and generally there is no virus involved during production, so the vaccination time is relatively long, and generally 3 doses are needed to complete the vaccination. It is recommended to vaccinate ≥4 weeks between 2 adjacent doses, while the second dose should be completed within 8 weeks after the first dose and the third dose within 6 months after the first dose. 2. Inactivated vaccine: It has the advantages of relatively small adverse reactions and relatively short vaccination time, but inactivated vaccine is mainly suitable for people aged 18-60 years. The composition of inactivated vaccine is similar to the structure of virus, and the production process is mature and the quality is stable. Moreover, inactivated vaccines usually require 2 doses, with an interval of 3-8 weeks between the 2 doses, and the overall time required is relatively short.