A Lin posted: " 施打疫苗還是能減少傳染病毒 雖然以下數據是針對delta, 的研究，但是omicron 應該還是有類似趨勢 施打兩劑Pfizer 12週後， 比沒打疫苗的人能減少 75%感染delta病毒的風險 25%傳染給別人delta的風險 如果一開始感染病毒的風險就減少75% 要先感染才能傳染 那他還是有一些減少傳染的能力 而且打疫苗的人平均比沒打的人早兩天清除病毒 當然，疫苗的重點還是在減少住院 But the same study found "
But the same study found the Pfizer-BioNTech vaccine, which NHS staff are likely to have had, endured better. Vaccinated people had a 25% lower risk of infecting others than unvaccinated people after 12 weeks.
And research looking at an infected person's chance of passing the virus on doesn't tell the whole story - the vaccines can also reduce people's risk to others by stopping them catching the virus in the first place.
These studies all looked at the Delta variant, first identified in India.
Two vaccine doses appear to be less effective against catching and passing on Omicron infections - although, they are still good at preventing severe illness - but much of the benefit is restored with a third booster jab.
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