Table 2. COVID-19 outbreak dynamics in the United States.
Contact period B, basic reproduction number R0 = C/B, fraction of initial latent population ρ = E0/I0, and the outbreak delay d0 using latent period A and infectious period C from the outbreak in China.
| parameter | mean ± std | interpretation |
|---|---|---|
| A [days] | 2.56 ± 0.72 | latent period (China) |
| B [days] | 3.38 ± 0.69 | contact period |
| C [days] | 17.82 ± 2.95 | infectious period (China) |
| R0 [-] | 5.30 ± 0.95 | basic reproduction no |
| ρ [-] | 43.75 ± 126.34 | initl latent population |
| d0 [days] | 41.28 ± 13.78 | outbreak delay |