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.
Differences in numbers of samples classified as "sufficiently protected" (serumdilution vs. concentration C in IU/ml), n = 2564
| Polio 1 | C<C0 | C>=C0 |
| Serum dil.< 1/4 | 90 | 11 |
| Serum dil.>=1/4 | 12 | 2451 |
| Polio 2 | ||
| Serum dil.< 1/4 | 97 | 17 |
| Serum dil.>=1/4 | 1 | 2449 |
| Polio 3 | ||
| Serum dil.< 1/4 | 182 | 0 |
| Serum dil.>=1/4 | 82 | 2300 |
