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 systemIMMUNITYquarantinedsymptomsvideoVIRUSVITAMINvlogYouTubeRelated Posts Did Your Allergies Get Worse After COVID? Watch This February 26, 2026 There may be a universal vaccine in the future. #science #vaccine #doctor February 21, 2026 The Immune Shift No One Explains After COVID February 19, 2026 Doctor Reacts: Covid masks in 2026?! February 19, 2026 ‘Particularly capricious’: Doctor weighs in on undermining of mRNA technology February 15, 2026 COVID’s Hidden Impact: Immune System Triggers Explained #shorts January 30, 2026