The SARS-CoV-2isanenvelopedβ-coronavirus,circularorelllipticalparticlediameterofabout60~140nm,oftenpleomorphic,obviouslydifferentfromSARS-CoVandMERS-CoVingeneticcharacteristics.Themainclinical manifestations includefever,fatigueandom , uas tuaj yeem tsim kho sai sai, mob ntshav qab zib mellitus, ua pa tsis ua haujlwm, mob ua pa nyuaj, mob septicshock, ntau lub cev tsis ua haujlwm, severeacid-basemetabolism disorder, thiab muaj kev hem thawj rau lub neej. .SARS-CoV-2 hassbeenidified asthemainmeansoftransmissionthroughrespiratorydroplets(sneezing,coughing,etc.)andcontact(pickingnostrilwiththehandincontactwiththevirus,rubbingeyes,etc.).SARS-CoV-2issensitivetoultravioletrayandheat3,andcanbeincontactwiththevirus, rubbingeyes,etc.). , 75% ethanol, chlorinedisinfectant, peraceticacidandchloroform.