How many shots does COVID-19 vaccine need? Three or two shots of COVID-19 vaccine

COVID-19 vaccine needs several shots

At present, COVID-19 inactivated vaccine is inoculated, with a total of 2 doses, and the interval between the two doses is 14-28 days.

The recommended immunization procedure of COVID-19 vaccine is 2 doses, with an interval of at least 14 days. The vaccination site is the deltoid muscle of the upper arm. In addition, because COVID-19 vaccine is a new vaccine, there is no safety and immunogenicity data for simultaneous vaccination with other vaccines, so it is not recommended to vaccinate with other vaccines at the same time. However, if there is a suspected rabies exposure who needs to be vaccinated with rabies vaccine and other trauma who need to be vaccinated with tetanus vaccine, the rabies vaccine and tetanus vaccine should be given priority. The interval between COVID-19 vaccine and other vaccines should not be less than 2 weeks.

Three injections or two injections of COVID-19 vaccine

two injections: inactivated vaccine

inactivated vaccine is a vaccine prepared by a series of purification technologies after killing the inactivated virus through physical and chemical methods. The main characteristics of this vaccine are that the vaccine ingredients are similar to natural viruses, the immune response is strong, and the safety is good. The vaccine is relatively stable and can be stored at 2-8 ℃ for 2-3 years. It is easy to transport. Two injections for immunization.

Three doses: recombinant protein vaccine

Recombinant protein vaccine is the most effective antigen component expressed in vitro cells through genetic engineering. Extracorporeal cells are engineered cell lines commonly used in biological products, similar to industrial fermentation, and ultimately produced into vaccines. The entire production process involves protein expression and purification, without the involvement of live viruses, making it safe and easy to produce on a large scale. From the past use process and experimental results of recombinant protein vaccines, the safety of recombinant protein vaccines can be guaranteed, and the adverse reaction rate is relatively low. Vaccines should be refrigerated at 2-8 ℃, with lower requirements for transportation and storage; 2-3 injections should be administered during vaccination.

2. Two injections at different intervals [SEP]: inactivated vaccine

novel coronavirus inactivated vaccine is divided into two injections. The interval between the first and second doses should be 3 weeks or more, and the second dose can be completed within 8 weeks after the first vaccination. Different types of novel coronavirus vaccines cannot replace vaccination.

Three injections: recombinant protein vaccine

recombinant new coronavirus vaccine is divided into three injections. The recommended interval between the first and second doses, as well as between the second and third doses, is 4 weeks or longer. The second vaccination should be completed within 8 weeks after the first vaccination, and the third vaccination should be completed within 6 months after the first administration.

If the first dose of recombinant coronavirus vaccine is administered, the vaccine can only be administered later. The inactivated novel coronavirus vaccine cannot be replaced.

Does COVID-19 vaccine need to be produced by the same manufacturer?

At present, there is no evidence that different manufacturers or different types of new coronavirus vaccines can substitute for vaccination. At present, it is recommended to use the same vaccine from the same manufacturer for vaccination.

It is not recommended to mix these two vaccines. People should use the same vaccine after the first and second injections. Vaccines from different manufacturers cannot be mixed, as even inactivated vaccines have different antigen content and adjuvant components. Mixing not only affects the efficacy, but may also increase the occurrence of adverse reactions and affect safety. Currently, various regions in China have begun to vaccinate key populations against COVID-19. If COVID-19 vaccine should not be mixed, can we get other types of vaccines (such as rabies vaccine) in the process of two doses of COVID-19 vaccine? Due to the lack of relevant research data on simultaneous vaccination of COVID-19 vaccine and other vaccines, COVID-19 vaccine and other vaccines should be vaccinated separately at an interval not less than two weeks before the national guidelines and programs are published.

Does COVID-19 Vaccine Need Money?

According to the current national policy, COVID-19 Vaccine is free of charge, and residents do not bear the cost.