Glossary of Terms: Epiverse-TRACE

G

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Generation time

Time between the onset of infectiousness of an index case and its secondary case. This always needs to be positive. The generation time distribution is commonly estimated from data on the serial interval distribution of an infection (Cori et al. 2017).

I

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Incubation period

The time between becoming infected and the onset of symptoms. More information on the incubation period. This can be different to the latent period as shown in Figure 4 from (Xiang et al. (2021)). The relationship between the incubation period and the serial interval helps to define the type of infection transmission (symptomatic or pre-symptomatic) (Nishiura et al. (2020)).

L

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Latent period

The time between becoming infected and the onset of infectiousness. This can be different to the incubation period as shown in Figure 4 from (Xiang et al, 2021)

Linelist

A linelist is a structured dataset in which each row represents an individual case or observation and each column represents a specific variable describing that case, such as demographic information, dates of symptom onset, exposure, or outcomes. Linelists are a fundamental data format in epidemiology

R

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Reporting delay

Delay or lag between the time an event occurs (e.g. symptom onset) and the time it is reported (Lawless, 1994). We can quantify it by comparing the linelist with successive versions of it or up-to-date reported aggregated case counts (Cori et al. 2017).

RDBMS

Relational Databases Management System.

S

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Serial interval

The time delay between the onset of symptoms between a primary case and a secondary case. This can be negative when pre-symptomatic infection occurs. Most commonly, the serial interval distribution of an infection is used to estimate the generation time distribution ((Cori et al., 2017)). The relationship between the serial interval and the incubation period helps to define the type of infection transmission (symptomatic or pre-symptomatic) (Nishiura et al. (2020)).