![]() ![]() ![]() We wanted to ascertain whether the small number of cases reported at the season’s onset (i.e., up to April) could be used as an early warning tool for predicting the magnitude of that season’s epidemic.įigure 2. On average, only 6.1% of the cases reported during a season (i.e., from February through January of the following year) are observed before the end of April (range 2.7%–9.0% of cases). Incidence was always lowest during the dry season (i.e., November–April) the nadirs usually occurred in February and the peaks in July (8 times), August (4 times), and June (1 time, in 2007). The magnitude of these outbreaks reached ≈10,000 cases versus the usual number of <5,000 cases. ![]() During this period, we observed 2 outbreaks of particularly high magnitude, in 2007 (dengue virus serotype 3) and 2012 (dengue virus serotype 1). Dark gray bars represent the 3 months (February, March, and April) used as predictors for.įrom January 2004 through December 2016, NDSS reported 215,574 probable dengue cases ( Figure 1). Monthly number of probable dengue cases reported to the National Dengue Surveillance System in Cambodia, 2004–2016. ![]()
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