Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Particle number in relation to incubation time. Absolute numbers represent the median of particles per 22 grid squares of three grids. Difference (Δ) in particle number between two succeeding incubation times is expressed as the quotient of absolute values.
| Suspension | 1 min | 5 min | Δ (1/5 min) | 10 min | Δ (5/10 min) | 20 min | Δ (10/20 min) |
|---|---|---|---|---|---|---|---|
| Spore, 107 part per ml | 1 | 10 | 10 | 19 | 1.9 | 26 | 1.4 |
| Virus, 107 part per ml | 12 | 25 | 2 | 42 | 1.7 | 101 | 2.4 |
