How long can the antibodies produced by the body last after being vaccinated with the new crown vaccine?

The "New Coronavirus Vaccination Technical Guidelines (First Edition)" stipulates that, on the basis of full notification, one dose of vaccine can be given to patients or infected persons who have been infected with the new coronavirus in 6 months.

Once antibodies are produced in the body, how long can they last? Let's take a look at the interpretation of experts.

Q: Recovered patients can be vaccinated after 6 months.

Q: When recovering patients or undergoing clinical antibody testing after vaccination, does the antibody positive mean that they have gained immunity?

An Zhijie, deputy director of the Immunization Program Center of the Chinese Center for Disease Control and Prevention: Now our routine clinical testing reagents and testing antibodies are used to diagnose whether the patient is infected or not, that is, we are not used to evaluate the protective effect of vaccines.

Q: How do I know if the vaccine I received can protect me?

An Zhijie, deputy director of the Immunization Program Center of the Chinese Center for Disease Control and Prevention: If the test is effective, the laboratory conditions it needs are different from our routine clinical antibody test, because it requires live virus , It is necessary to use a P3 (Biosafety Protection Level 3) laboratory to detect the neutralizing antibodies produced after you are vaccinated.