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The story continues

TB isolates were available for 26 individuals who were thought to be part of this community; you can see how the cases were related geographically.

Genome sequencing was applied to all the 26 isolates and a cluster diagram was constructed by comparing the number of SNPs between isolates.

Does this situation seem familiar? The cluster diagram you saw back in Exercise 6 was in fact constructed using genomic data from TB isolated from cases in these four towns.

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