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Copyright ©The Author(s) 2021.
World J Virol. Mar 25, 2021; 10(2): 62-68
Published online Mar 25, 2021. doi: 10.5501/wjv.v10.i2.62
Table 1 Clinical differences between influenza and coronavirus disease 2019
Characteristics
Clinical differences
Signs and symptomsInfluenza: Mild to severe illness, including common signs and symptoms. COVID-19: More serious illnesses in some people. Change or loss of taste or smell may be included
Incubation periodFlu: 1-4 d after infection. COVID-19: 5 d, but symptoms can appear as early as 2 d or as late as 14 d after infection
Duration of the symptomsFlu: 3-7 d. COVID-19: 2-3 wk
Asymptomatic patientsFlu: 10%. COVID-19: A few 60%