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Most infectious at 1st signs 新冠患病初期传染性强 Studies show people with the novel coronavirus are most infectious just at the point when they first begin to feel unwell, World Health Organization (WHO) experts said on Tuesday. 世界卫生组织专家6月9日称，研究显示，新冠病毒患者一开始感到身体不适时最具传染性。 This feature has made it so hard to control spread of the virus that causes COVID-19, but it can be done through rigorous testing and social distancing, they said. 这一特点使得控制新冠病毒传播非常困难，但仍可通过严格检测和社交距离得以实现。 | 
