What made these outbreaks difficult to stop, public health officials say, is that they were hurting the people who are hardest to reach: those who are homeless, transient or using drugs, and who don't trust the health care system after years of stigmatization.
The noisiness of school surveillance data makes detection of outbreaks difficult (10 ).
And as already noted, it is very difficult to detect outbreaks from ingestion of low-dose levels.
Their message is straightforward: Use water wisely, and try to keep tents clean to prevent disease outbreaks – difficult tasks in a growing camp on dry and dusty land.
It may be that modern large-scale production of pasteurized milk provides complete protection, or that the protection is sometimes <100% but that wide distribution networks for milk make it difficult to detect outbreaks following minor levels of contamination and partial pasteurization failure so that they are lost into the background of apparently sporadic cases.
Since an increase in k reflected the need to have larger deviations away from the baseline mean to trigger a signal, we found that use of a larger k made it more difficult to detect outbreaks with a slow amplification phase.
From 1936 to 1943, he worked in the Middle East for the Imperial War Graves Commission, a task made difficult by the outbreak of the Second World War and the subsequent fighting in the region.
By Laurent Duvillier Delivering life-saving vaccines and medicines has become extremely difficult since the outbreak of conflict in Central African Republic, but UNICEF and its partners continue their efforts to reach as many children as possible.
Furthermore, identification of a well-defined target population, a major prerequisite for OCV campaigns (14 ), was difficult because the outbreak had spread rapidly to all 10 departments within ≈1 month (4 ); >1,000 cases were confirmed in each department by January 16 , 2011
Though it would have been difficult to identify outbreak strains on the basis of HL serotype alone, this method did help confirm the link between outbreak strains in humans and isolates from farm 2. The 125 and 128 serotypes have been seen infrequently by NLEP and are more "unique" markers than either HS serotype O 2 or phage type 33.
