Full Vaccination的定义也许会被修改为成打了三针。
提前说明一下： 科学家需要时间观察，收集数据和分析，请不要抱怨这个太晚了，或者改来改去的。
1. 加强针有助于防止传染：
here were 149 cases per 100,000 people on average each week. For those who had only two doses, it was 255 cases per 100,000 people.‘
2.加强针有助于防止得病
A third study, published in the medical journal JAMA, showed that having a booster helped prevent people from becoming ill with Omicron. That study of just over 13,000 US Omicron cases found that the odds of developing a symptomatic infection were 66% lower for people who were boosted compared to those who had only received two shots.
3. 加强针对住院的防止又90%的有效率
Getting boosted was 90% effective at preventing hospitalizations during a period in December and January when Omicron was the dominant variant, according to a CDC study that looked at nearly 88,000 hospitalizations across 10 states.
In comparison, getting two shots was 57% effective when it had been at least six months past the second shot
