Shenyang starts the second dose of new coronavirus vaccine booster immunization!

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Recently, the national joint prevention and control mechanism has successively issued the “Program for Strengthening New Coronavirus Vaccination for the Elderly” and the “Implementation Program for the Second Dose of New Coronavirus Vaccine Booster Immunization” to help promote the prevention and control of the new coronavirus epidemic.

Shenyang in accordance with the requirements of the higher level

Continuously promote the new crown vaccination for the elderly

and started the second dose of “booster” vaccination for the new crown vaccine

According to the national unified deployment

At this stage, the target population for the second dose of booster vaccination is

People at high risk of infection

Elderly people over 60 years old

People with more serious underlying diseases

People with low immunity

Between the two booster doses

How long do I have to wait between booster shots?

How to choose the second dose of booster vaccine?

……

Shenyang Center for Disease Control and Prevention

The latest answer from Li Xuanyi, Deputy Director of the Immunization Planning Institute

After the “third dose”

Why do I need a “fourth” dose?

The level of neutralizing antibodies produced by the vaccine decreases over time after vaccination with the new crown vaccine, and the protective effect against infection decreases more significantly, but with the effect of cellular immunity, a high protective effect against severe illness or death can still be maintained. After the fourth dose, the immune system can be activated within a short period of time to regain high levels of neutralizing antibodies against the mutated strains of the new coronavirus, thus improving protection.

Between booster doses

How long do I need to wait between booster shots?

Two booster doses should be given at least 6 months apart. That is, if you have received the first two doses of inactivated vaccine and the third dose has been administered for 6 months or if you have received two doses of Kangenox vaccine intramuscularly for 6 months.

How to choose the second “booster” vaccine?

Depending on the progress of vaccine development, all vaccines approved for marketing with additional conditions or for emergency use can be used for a second booster dose. Priority will be given to sequential booster vaccinations or second dose booster vaccinations with vaccines containing Omicron strains with good cross-immunity.

Sequential booster immunization is a booster immunization using a vaccine with a different technical route than the basic immunization. If the vaccine is of the same technical route but from a different manufacturer, it is not a sequential immunization. For example, if the public received the first three doses of inactivated vaccine, they can choose to receive the fourth dose of vaccine with different technical routes such as adenovirus vector and CHO recombinant protein, which are already available in China. Both intramuscular and inhalation vaccination options are available.

Why are booster vaccinations more necessary for the elderly?

Both domestic and international data show that elderly people can significantly control the disease and death rate after receiving a booster vaccination, and the rate can be further reduced after receiving a second dose of booster vaccination. By receiving a second booster dose, older adults can raise their antibody levels in a faster time frame and better improve their protection.

Is it too late for seniors to get vaccinated?

Usually, antibodies are produced 1-2 weeks after vaccination, and the antibodies produced 4 weeks after the full immunization can reach a higher level, which means a better protection is produced. In the case of booster immunization, the antibodies produced after vaccination will be produced faster than the basic immunization because of the immune memory. It takes time to produce antibodies, especially high levels of antibodies, after vaccination. In the current situation of the new crown epidemic, it is recommended that elderly people who have not completed vaccination complete the full and booster immunization according to the procedure as soon as possible so that the protective effect of the vaccine can be better utilized.