SECTION 16 AND FORM 144
POWER OF ATTORNEY

      With respect to holdings of and transactions in securities
issued by bluebird bio, Inc. (the "Company"), the undersigned hereby
constitutes and appoints the individuals named on Schedule A attached
hereto and as may be amended from time to time, or any of them
signing singly, with full power of substitution and resubstitution,
to act as the undersigned's true and lawful attorney-in-fact to:

1.	execute for and on behalf of the undersigned, Schedules 13D
and 13G in accordance with Section 13 of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and
the rules thereunder, and Forms 3, 4, and 5 in accordance
with Section 16 of the Exchange Act and the rules thereunder,
and Notices of Proposed Sale of Securities Pursuant to Rule
144 ("Form 144"), in accordance with the requirements of Rule
144 under the Securities Act of 1933, as amended (the
"Securities Act"); and

2.	do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete
and execute any such Schedule 13D, Schedule 13G, Form 3, Form
4, Form 5, and Form 144, complete and execute any amendment
or amendments thereto, and to timely file such Schedule 13D,
Schedule 13G, Form 3, Form 4, Form 5, and Form 144, as
applicable, and any amendment thereto, with the United States
Securities and Exchange Commission  and any stock exchange or
similar authority.

	The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and thing
whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if
personally present, with full power of substitution and
resubstitution or revocation, hereby ratifying and confirming all
that such attorney-in-fact, or such attorneys-in-fact substitute or
substitutes, shall lawfully do or cause to be done by virtue of this
Power of Attorney and the rights and powers herein granted.

      The undersigned acknowledges that the foregoing attorneys-in-
fact, in serving in such capacity at the request of the undersigned,
are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 13 and Section
16 of the Exchange Act, or Rule 144 under the Securities Act.

      This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file any Schedule 13D,
Schedule 13G, Form 3, Form 4, Form 5, and Form 144 with respect to
the undersigned's holdings of and transactions in securities issued
by the Company, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact.

	IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 23rd day of September, 2024.


/s/ Joseph Vittiglio
Joseph Vittiglio


Schedule A

INDIVIDUALS APPOINTED AS ATTORNEY-IN-FACT,
WITH FULL POWER OF SUBSTITUTION AND RESUBSTITUTION

1.	Andrew Obenshain
2.	Sydney Gaylin