EARLY DETECTION AND RESPONSE TO MENINGOCOCCAL DISEASE EPIDEMICS IN SUB-SAHARAN AFRICA: APPRAISAL OF THE WHO STRATEGY

OBJECTIVE: To assess the sensitivity, specificity and predictive value positive of the WHO threshold strategy for detecting meningococcal disease epidemics in sub-Saharan Africa and to estimate the impact of the strategy on an epidemic at district level.METHODS: Data on meningitis cases at the district level were collected weekly from health minist

Global navigation satellite systems technology is at the core of modern air traffic navigation.Aircraft use it to estimate their position, while air navigation service providers rely on services such as automatic dependent surveillance broadcast which have been enabled by this technology.Since satellite signals are very low in power, they are susce