Some people with coronavirus have said they don’t know how they got it. Infectious disease expert Michael Osterholm joins “CBS This Morning” to discuss how long it could take for symptoms to show up and how long the virus may live on surfaces. ContagiousCoronaviruscoronavirus immunityCOVID-19Diagnosedimmune systemIMMUNITYquarantinedsymptomsvideoVIRUSVITAMINvlogYouTube
