"The vaccine is not enough, can you mix it?" "There are so many mutant viruses abroad, will the vaccine fail?" With the continuous expansion of vaccination scope, many people have more and more questions about vaccination. In response to these questions, Guo Yonghao, director of the Laboratory of Immunization Planning Institute of Henan CDC, made a "quick answer", hoping that these answers would be helpful to everyone.
The specific problems are as follows:
Q: What are the differences among the three vaccines currently approved?
A: These three types are only different in production process, which are approved for emergency use in our country and can meet the needs of epidemic prevention and control.
Q: How long is the vaccination interval for 2 or 3 shots?
A: According to the provisions of the vaccination technical guidelines, the "two needles" Inactivated Vaccine (Vero cells) should be completed in 3 to 8 weeks; one dose of "one needle" recombinant coronavirus vaccine (Type 5 adenovirus vector) is enough; "three needles" recombinant coronavirus vaccine (CHO cells) the second dose should be completed within 4 to 8 weeks, and the third dose should be completed within 6 months after the first dose.
Q: If the recommended vaccination interval is exceeded, is the vaccine still effective? What should I do?
A: those who fail to complete the vaccination according to the procedure suggest replanting as soon as possible, so there is no need to reinject the first shot.
Q: must vaccines produced by the same enterprise be used to complete the whole vaccination?
A: try to use the same vaccine product to complete the vaccination. In special cases, other enterprise vaccines of the same kind can also be used to complete the vaccination.
Q: Now there are so many mutant viruses abroad, will the vaccine fail?
A: At present, vaccination is still the most effective way to prevent the epidemic. The antibodies produced by the human body after vaccination can still provide protection for the body.
Q: How long will the vaccine be protective?
A: generally, 2-3 weeks after completing the whole immune program, higher concentrations of antibodies can be produced.
Q: How long is the current vaccine valid? When should the vaccinated population be immune to the needle?
A: The validity period is still being tracked and studied worldwide, and there is no very clear conclusion at present. At this stage, we do not recommend strengthening immunity for the time being.
Q: Do people who cure covid-19 need to be vaccinated?
A: existing research data show that the incidence of re-infection is rare within 6 months after coronavirus infection. Previous covid-19 patients (patients or asymptomatic patients) can receive the first injection 6 months after cure on the basis of full notification.
Q: Do you have any special reminders about vaccination?
A: The vaccine must be "full set". Multiple research results show that only by completing all vaccination according to the vaccination procedure can better protective effect be produced, and the inoculation of the second and third needles must not be underestimated. You must timely inoculate the follow-up needles to achieve the maximum protection effect.
