Table 1.

Adjusted parameters based on reports in the United States.

COVASIM construct	Initial value	Modified value	Rationale for modification
Incubation: delay from infection to viral shedding	Lognormal(4.6, 4.8)	Lognormal(4.1, 4.8)	The combined distribution of the incubation period did not match the latest evidence. The adjustment aligns it with the evidence.
Incubation: delay from viral shedding to onset of symptoms	Lognormal(1,1)	Lognormal(1, 1.8)	Same as above
Proportion of symptomatic cases	0.7	0.6	Although reports vary, Dr Fauci stated that 40% of the US cases were asymptomatic.