To understand just how rare, look back into history to, say, the Johnson Act of 1924. Its national-origins quota system reverberated with nativism and racism.

After an hour or so the veil lifted and discovered beneath it fifty horsemen, ravening lions to the sight, in steel armour dight. We observed them straightly, and lo! they were cutters-off of the highway, wild as wild Arabs.

He that loveth pleasure shall be a poor man: he that loveth wine and oil shall not be rich.

The lack of an association with particular strain lineages suggests that host factors predominate in the breakdown towards mycobacteremia.