Why HPV3?

HPV vaccine is therefore three shots, in order to obtain a better prevention of HP infection effect. After the first injection of HP vaccine, the human body will form some antibodies. The concentration of antibodies is not particularly high, and the duration of antibodies is not particularly long. During the effective time of this antibody, the second injection will form more antibodies and protect for a longer time. After three injections, relatively more antibodies will be formed and the protection time will be relatively long. Therefore, the three-needle approach is adopted in order to obtain relatively good protection.