Enter the transmissibility, rate of contact, and duration into the calculator to determine the basic reproduction number, R0.
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The following formula is used to calculate the basic reproduction number:
R0 = t*c*d
- Where R0 is the basic reproductive number
- t is the transmissibility (infections per contact)
- c is the rate of contact (contact per time)
- d is the total time of infectiousness (time per infection)
What is R0?
R0 is a symbol used to denote the basic reproductive number of an infection. This value represents the total number of expected secondary cases produced by a single infection in a completely susceptible population.
Basic Reprodoction Number Example
How to calculate R0?
- First, determine the transmissibility of the infection/disease.
For this example, the transmissibility is .75 infections per contact.
- Next, determine the rate of contact.
For the problem, the rate of contact is 4 contacts per hour.
- Next, determine the total time of infectiousness.
In this case, the infectiousness lasts for 6 hours.
- Finally, calculate R0.
Using the formula above, the basic reproduction number is calculated as:
R0 = t*c*d
R0 = .75*4*6
R0 = 18