These cases were linked to importation of D4-Hamburg from Bulgaria and did not initiate virus spread within Germany.
However, these countries claimed that their cases were linked to importation, with no sustained human-to-human transmission within their borders.
In contrast, pro-active closures as implemented in Osaka and Hyogo prefectures in Japan or in HK were simply triggered by the first local pandemic cases that were not linked to importation.
For example, in populations in which many individuals have been immunized, the diversity of strains isolated from cases can be high, since most cases may be linked to importations from other areas, and the high level of immunity in the population results in most of the chains of transmission being small.
Previously, the introduction of B. pseudomallei into non-endemic regions has been linked to the importation of infected animal carriers [24], [25], and anthropogenic influences are highly likely to have been responsible for the dissemination of B. pseudomallei from Australia into Asia.
It has been suggested that the genetic diversity of MA might be linked to the importation of animals, with MA in self-sufficient countries having less genetic heterogeneity [ 10].
The type A-east infections along the Atlantic Coast may be linked to the importation of rabbits from Arkansas, Oklahoma, Missouri, and Kansas to hunting clubs in Massachusetts, Pennsylvania, New Jersey, and Maryland in the 1920s and 1930s (17, 23 ).
Every day, people cross over this border and some may have brought measles virus along with them into CAR but without in-depth case investigations and clear data on the outbreak that occurred in Chad, it is difficult to conclude whether the cases in CAR were endemic or linked to an importation from Chad.
This importation may be linked to or driven by high rates of transmission among young adults.
Drug Foundation executive officer Ross Bell believes rising importations could be linked to the arrival of cleanup workers from overseas.
This limitation is also observed concerning importation and transmission of M. tuberculosis clones phylogeographically linked to surrounding countries of the region (i.e., Guyana, Suriname, Haiti, and St. Lucia).
