The advantages and disadvantages of one-shot, two-shot and three-shot vaccines are different according to the number of shots, so you can choose to receive them according to your own situation.
1. Taking the new coronary vaccine as an example, one-shot vaccine, such as adenovirus carrier vaccine, has the advantage of relatively fewer injections, which reduces the pain of the inoculant, but the disadvantage of fewer applications in China and lower safety compared to the other two, and the intensity of immune response is weaker.
2. The two-shot vaccine is the more common new coronary vaccine, i.e., inactivated new coronary virus vaccine, the advantage is that the supply is sufficient, convenient to vaccinate, the disadvantage is that the booster shot is still in the research and development stage.
3. Three-shot vaccine, i.e. recombinant protein vaccine, has the advantages of high production safety and low cost, but the disadvantage that three shots are required and the interval between two shots is longer, resulting in a longer vaccination cycle.
You can choose the vaccine that suits you according to your situation and regional vaccine supply.