In which section of the spinal column are the atlas
and axis bones located?

The cervical is the first part of the spinal cord and it name is 7 because it has 7 bones. So the atlas is the most top bone below the skull and that is followed by the axis which is under the skull

answer:

it could come from a variety of sources.

explanation:

..although it was most likely developed through zoonotic transmission, where an infectious disease which usually afflicts when animals jump to humans.