Description Usage Arguments Details Value Note Examples
Calculates the expected number of vaccinations for individuals.
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z |
the eligibility vector for the individual, i.e. @codez[j] = 1 if this individual is eligible for campaign @c j, otherwise @codez[j] = 0 |
w |
the weight vector for the individual, i.e. @code w[k] gives the probability of the individual receiving the routine vaccination in year @c k |
v |
the doses vector providing the number of vaccine doses nominally distributed in each campaign |
N |
the population size vector specifying the number of people in the target age range for each campaign |
alpha |
the vaccination efficiency parameter (scalar) for the campaign; @codealpha = -inf implies perfect efficiency, @codealpha = 0 implies random efficiency; see note above |
rho |
the proportion of the population (scalar) that can be vaccinated, i.e @code1 - rho is the @e inaccessible portion of the general population. |
log |
a flag indicating whether the log probability should be returned; the default is @c FALSE <i><b>NOTE: the @c log parameter is @b not currently used.</b></i> |
cond.on.accessible |
a flag indicating whether the return value should be conditioned on the individual's inclusion in the accessible population, i.e. @p rho; the default is @c FALSE |
The @c E.vacc function complements the probability calculation @c g and computes the expected vaccination count that an individual would have received during a specified set of vaccination activities. The vaccination activities are described by inputs @p v and @p N; @p v provides the number of doses distributed and @p N provides the target population size for each activity. An individual's probability is determined by inputs @p z and @p w; @p z indicates which activities the individual is eligible for and @p w provides the pseudo-campaign weighting that specifies the probability of child receiving a routine vaccination each year. Finally, the scalar parameters, @p alpha and @p rho, quantify campaign efficiency and the size of accessible population, respectively.
the expected number of vaccinations for an individual with eligibility vector @p z and weight vector @p w during the campaigns described by @p v and @p N
The inefficiency measure @p alpha is defined as the natural log of psi, i.e. @codepsi = e^alpha. @codepsi = 0 (@codealpha = -inf) represents perfect efficiency, i.e. when every dose results in an additional vaccinee. @codepsi = 1 (@codealpha = 0) represents random efficiency, i.e. when probability of any dose resulting in an additional vaccinee is independent of receiving a dose previously during the same campaign.
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