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.
R0 and threshold value of herd immunity of common vaccine-preventable contagious diseases.
| Disease | Route of transmission | R0 | Herd immunity threshold |
| Diphtheria | Saliva | 6–7 | 83–85% |
| Measles | Air borne | 12–18 | 92–94% |
| Mumps | Droplet spread | 4–7 | 75–86% |
| Pertussis | Droplet spread | 12–17 | 80–94% |
| Poliomyelitis | Fecal-oral transmission | 5–7 | 50–95% |
| Rubella | Droplet spread | 5–7 | 83–85% |
| Smallpox | Contact transmission | 6–7 | 80–85% |
