In the meantime, we must maintain public health measures that work: masking, physical distancing, handwashing, respiratory and cough hygiene, avoiding crowds, and ensuring good ventilation.
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它对新变异株有效吗？
Does it work againstnew variants?
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该疫苗对病毒变异株依然有效。
The vaccine remains effective against virus variants, though for the Omicron variant, vaccine effectiveness against severe and mild disease after two doses is lower compared to Delta, and waning is more rapid.
Therefore, a third dose (first booster) is recommended for all adults, and a second booster for the highest priority-use groups.
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这种疫苗与已在使用的其他COVID-19疫苗相比如何？
How does this vaccine compare to other COVID-19 vaccines already in use?
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由于在设计相关研究时采用了不同方法，因此不可能对疫苗进行直接比较。
It is impossible to compare vaccines head-to-head due to the different approaches taken in designing the respective studies, but overall, all of the vaccines that have achieved WHO Emergency Use Listing are highly effective in preventing severe disease and hospitalization due to COVID-19.
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本网页于8月18日更新，以体现最新指导建议。
This webpage was updated on 18 August 2022 to reflect the latest guidance.