US CDC testing retrospectively for MERS in Jordan.

I'm little slow on this day old story. Jordan was the site of the first MERS-CoV cases, confirmed retrospectively by NAMRU-3 (see MERS page; Cluster #1). 

The US CDC has been sent 124 samples by the Jordan Ministry of Health from around that time to help further investigate the source of the (as far as we know) first outbreak. 

The 2 cases that had been confirmed were healthcare workers, including an intensive care unit nurse. This strongly suggests at least 1 patient with the unexplained pneumonia occurring in Jordan around April 2012, was a source of the MERS-CoV.
Raises the question of what Hajj 2012 serum samples would reveal?