Is the RT-PCR test required even after receiving 3 doses (2 doses + booster dose) of COVID-19 vaccination?
即使在接种了3剂（2剂+加强剂）COVID-19疫苗后，还需要进行RT-PCR检测吗？
The RT-PCR test is necessary if arriving from or transiting through any of the high-risk countries, regardless of the traveler’s COVID-19 vaccination status.
如果从任何一个高风险国家入境或过境，无论旅行者的COVID-19疫苗接种情况如何，都必须进行RT-PCR检测。