SHIELD
Morbillivirus? It's the measles. My guess is that this is a kind of mutated strain of the virus that's really going to suck a lot if it's released in the general public.
Our contact at the Daily Bugle is a reporter named Betty Brant, she's covered a few terrorist attacks and other sensational stories in the past which is probably why this group reached out to her. I'll put you two in contact. Officially, as I'm sure you're aware, it's the CIA Counter-Terrorism Unit that the DB is co-operating with, you - and any SHIELD agents on your team - are just 'CIA consultants,' on record.
Let me know what you find regarding a precise location. I've given Brant instructions to reach out to the group for some clarifying details, like she's going to report the story to buy us some time and get as much incriminating evidence on them as possible.
Boston is an educated guess, given the proximity to MIT in Cambridge. But give me more when you get more and we'll decide what the best course of action will be.