Table 2.
Survival time of viruses on each surface.
| Survival time, hour, median (95% CI) |
||
|---|---|---|
| IAV | SARS-CoV-2 | |
| Plain paper (PP) | 10.29 (8.80–12.06) |
59.78 (53.99–65.57) |
| Inkjet paper (IP) | 1.75 (1.38–2.32) |
6.48 (5.30–7.88) |
| Inkjet photo paper (IPP) | 3.32 (2.69–4.15) |
9.78 (7.88–11.92) |
The elapsed time was defined as an explanatory variable (X-axis), and the log virus titer of IAV or SARS-CoV-2 was defined as an explained variable (Y-axis). Least-squares linear regression analysis was performed for each virus to generate a curve of regression. The measurement limits of the titers of IAV and SARS-CoV-2 were 101 FFU and 100.5 TCID50, respectively; therefore, the survival times of IAV and SARS-CoV-2 were defined as the X values when the Y values of the regression curves were 1.0 and 0.5, respectively.