各国最担心的来了，复阳：South Korea reports 91 patients

South Korea reports 91 recovered coronavirus patients testing positive again

https://www.reuters.com/article/us-health-coronavirus-southkorea/south-korea-reports-recovered-coronavirus-patients-testing-positive-again-idUSKCN21S15X

“The number will only increase, 91 is just the beginning now,” said Kim Woo-joo, professor of infectious diseases at Korea University Guro Hospital. He said it was likely that the patients had “relapsed” rather than been infected a second time.

个人推测：这个病毒就是人工合成的，由sars病毒和艾滋病毒组成。（没有科学依据，只是从症状推测）

高传染性，呼吸系统疾病--sars
恶心，呕吐，隐藏性高，难以去除，腹泻----AIDS

附上艾滋感染初期的症状，和covid19很像。

Primary infection (Acute HIV)
Some people infected by HIV develop a flu-like illness within two to four weeks after the virus enters the body. This illness, known as primary (acute) HIV infection, may last for a few weeks. Possible signs and symptoms include:

• Fever
• Headache
• Muscle aches and joint pain
• Rash
• Sore throat and painful mouth sores
• Swollen lymph glands, mainly on the neck
• Diarrhea
• Weight loss
• Cough
• Night sweats

These symptoms can be so mild that you might not even notice them（对应covid19大部分轻症无症患者）. However, the amount of virus in your bloodstream (viral load) is quite high at this time. As a result, the infection spreads more easily during primary infection than during the next stage.（对应covid19感染初期传染性最强的说法）