随着诊断经验的积累，人们发现新冠病毒感染者的症状并不只是乏力、咳嗽、发

With the accumulation of diagnostic experience, people found that the symptoms of New Coronavirus infection are not just fatigue, cough, fever, but also diarrhea, runny nose, and even found that New Coronavirus also attacks the human immune system. This brings trouble to diagnosis and prevention. The most disturbing is its concealment. Many people infected with the new coronavirus do not have these symptoms, but they are also quite contagious. After analysis and research, experts believe that these asymptomatic infections are half as infectious as those with symptomatic infections, which means that these asymptomatic people can transmit the virus to 1-2 people.

随着诊断经验的积累，人们发现新冠病毒感染者的症状并不只是乏力、咳嗽、发烧，还可能会是腹泻、流鼻涕，甚至发现新冠病毒对人体免疫系统也有攻击。这就给诊断和防控带来了麻烦。最令人不安的是它的隐蔽性，很多感染了新冠病毒的人并没有所说的这些症状，可是他们也有比较强的传染性。专家在分析研究后，认为这些无症状感染者的传染力是带症状感染者的一半，也就是说这些无症状的能够将病毒传染给1-2人。

With the accumulation of diagnosis experience, it is found that the symptoms of people infected with new coronavirus are not only fatigue, cough, fever, but also diarrhea, runny nose, and even found that new coronavirus attacks the human immune system. This brings troubles to diagnosis and control. The most disturbing is its concealment. Many people infected with the new coronavirus do not have these symptoms, but they are also highly infectious. After analysis and research, experts believe that the infectious power of these asymptomatic infections is half of that of those with symptoms, that is to say, these asymptomatic infections can spread the virus to 1-2 people.