Although there are relatively little data on the duration of immunity, this is consistent with one study from Madagascar that reported reduced rates of fever in infected individuals born prior to the extensive successful malaria control program initiated in the 1950's, suggesting long-term immunological memory [21].
They enable researchers to collect data on the duration and sequence of activities, for example per hour or per day.
Time motion studies were first described in the early 20th century in industrial engineering, referring to a quantitative data collection method where an external observer captured detailed data on the duration and movements required to accomplish a specific task, coupled with an analysis focused on improving efficiency.
Milliken et al. [21] used data reported from physicians instead of administrative databases for the outputs and for patient characteristics and they did not include any data on the duration of consultations, and they used FTE counts instead of the numbers of hours spent on direct patient care for the physician inputs.
First, aerial foragers replace their primaries very slowly relative to other birds of similar size, as shown by data on the duration of the primary molt in two species of swallows [29],[30] and by these data for H. mystacea.
It is straightforward to include an incubation period [43] and, given data on the duration of these periods on a case by case basis, these issues can be addressed by including additional Bayesian estimation steps (see [32]).
However, since culling is still ongoing in the Four Areas, that study provides no data on the duration of impacts post-culling which can be compared with the results presented here.
Since data on the duration of these responses were not available at the time the Phase 2 trial began, the highest dose with an acceptable safety profile, 50 µg, was selected for further evaluation.
Data on the duration of protection following each dose of IPT would help to define the optimum interval between IPT doses, enabling development of the optimal delivery strategy for a given location.
As shown by the detailed age-structure model of Pongtavornpinyo et al. (2008), empirical data on the duration of infection and other functions relating immunity to central epidemiological parameters are critical to models that consider the spread of resistance, especially for new drugs and multi-drug treatments (such as ACT).
However, data on the duration of immune memory in immunocompromised persons are limited (4).
