The difference between one, two and three shots of vaccine lies in the different types, different vaccination time and different suitable groups.
1. Different types: recombinant subunit vaccine requires three injections, the manufacturing process does not require live viruses, relatively high safety; two-shot vaccine is more common, the virus will be purified and extracted after inactivation, the immune response effect is good; one-shot vaccine is adenovirus vaccine.
2. Different vaccination time: the interval between two shots is 3~8 weeks; the interval between three shots is 4~8 weeks, and the third shot needs to be completed within 6 months after the first shot.
3. Suitable for different groups of people: a vaccine requires the vaccinee to be in good physical condition, suitable for good health and the need for short-term emergency population; two shots of three vaccine antibodies are weak, so you need two shots before the effect, the third shot is called booster shot, can produce stronger and more durable antibodies.
These three types of vaccines all meet our country’s vaccine testing standards and are permitted to be vaccinated, so there is no stipulation on which type of vaccine must be vaccinated, and the vaccinated person can be vaccinated according to their physical condition and willingness, combined with the recommendations of the vaccinators.