ROs & Thresholds

Microbiology Lab

Mumps RO

4-7

Mumps Threshold

75-86%

Polio RO

5-7

Polio Threshold

80-86%

Smallpox RO

5-7

Smallpox Threshold

80-85

Diphtheria RO

6-7

Diphtheria Threshold

85

Rubella RO

6-7

Rubella Threshold

83-85

Pertussis RO

12-17

Pertussis Threshold

92-94

Measles RO

12-18

Measles Threshold

83-94

Reproductive Number (RO)

How many people one person can infect

Threshold %

The amount of the population vaccinated in order to obtain Herd immunity. (Typically this number is very high.)