Exhibit 10.26



FIRST AMENDMENT TO THE

BLOOD DONOR CENTER MANAGEMENT

COMMUNITY MOBILE BLOOD COLLECTIONS
SERVICES
AGREEMENT

This FIRST
AMENDMENT is entered into by and between USC University Hospital, Inc.,doing business as USC University Hospital(“Hospital”),
a medical center located at 1500 San Pablo Street, Los Angeles, California 90033 and HemaCare Corporation(“HemaCare”),
located at 21101 Oxnard Street, Woodland Hills, California 91367.



RECITALS

A.Hospital and HemaCare are parties to that certain Services Contract (the “Agreement”)
effective May 1,2004.

B.Hospital and HemaCare desire to amend the terms of the Agreement as set forth herein below.

NOW, THEREFORE,
the parties hereto, based upon the above recitals and the covenants and conditions set forth herein, agree as follows:

1.TERM AND TERMINATION.Section VI, paragraph A of the Agreement shall be amended as
follows:

This agreement shall commence
May 1, 2006 and continue for a term of one (1) year.

2.HEMACARE'S COMPENSATION.For Services rendered pursuant to this Agreement, Hospital
shall pay HemaCare in accordance with the attached revised Fee Schedule, Attachment I.

3.ESTIMATED HOSPITAL DEMAND FOR SERVICES.Hospital agrees to purchase from HemaCare all
allogeneic units of blood and blood products collected and produced on its behalf in accordance with the attached revised page
14 of the Agreement, Attachment II.

4.GENERAL.If provisions of this Amendment and the Agreement conflict, the provisions
of this Amendment shall prevail. Except as specifically amended herein, all terms and conditions of the Agreement shall remain
in full force and effect.

THE PARTIES HERETO
have executed this Amendment on the 7th day of March, 2006.

|USC UNIVERSITY HOSPITAL |                         | HEMACARE CORPORATION
|----------------------- | ----------------------- | --------------------
|                        |                         |                     
|/s/                     | Ted Schreck             |                     
|By:                     | Ted Schreck             |                     
|Title:                  | Chief Executive Officer |                     











Attachment I

USC UNIVERSITY HOSPITAL
BLOOD SERVICES FEE SCHEDULEHospital Services Direct Order Lines

800-826-7962 or 818-986-3977

|COMPONENT Fees Per Unit                                              |      
|-------------------------------------------------------------------- | -----
|Directed Donor Red Blood Cells                                       | $[l]1
|Directed Donor Leukocyte Reduced Red Blood Cells                     | $[l] 
|Directed Donor Leukocyte Reduced Red Blood Cells, Irradiated         | $[l] 
|Directed Donor Single Donor Platelets, Leukocyte Reduced             | $[l] 
|Directed Donor Single Donor Platelets, Leukocyte Reduced, Irradiated | $[l] 
|Autologous Donor Red Blood Cells                                     | $[l] 
|Autologous Donor Red Leukocyte Reduced Red Blood Cells               | $[l] 
|Leukocyte Reduced Single Donor Platelets                             | $[l] 
|Leukocyte Reduced Single Donor Platelets, Pediatric Unit             | $[l] 
|Allogeneic Red Blood Cells                                           | $[l] 
|Allogeneic Red Blood Cells, Irradiated                               | $[l] 
|Allogeneic Red Blood Cells, Irradiated, CMV-                         | $[l] 
|Allogeneic Leukocyte Reduced Red Blood Cells                         | $[l] 
|Allogeneic Leukocyte Reduced Red Blood Cells, Irradiated             | $[l] 
|Allogeneic Leukocyte Reduced Red Blood Cells, Irradiated, CMV-       | $[l] 
|Fresh Frozen Plasma                                                  | $[l] 
|Cryoprecipitate                                                      | $[l] 
|Cryo-Poor Plasma                                                     | $[l] 
|Therapeutic Phlebotomy                                               | $[l] 
|ADDITIONAL SERVICES                                                  |      
|CMV Negative Screening Per Unit                                      | $[l] 
|Irradiation Fee Per Unit                                             | $[l] 
|STAT Distribution Fee Per Order                                      | [l]  
|Courier Services in Addition to Normal Delivery                      | $[l] 

Subject to terms and conditions
in Blood Donor Center Management Community Mobile Blood Collections Services Agreement. Prices in effect through 04-30-07.

Effective 05-01-06






1Terms represented by this symbol are considered confidential. These confidential terms have been omitted pursuant to a Confidential
Treatment Request filed with the Securities and Exchange Commission (“SEC”) and have been filed separately with the
SEC.















ATTACHMENT II
ESTIMATED HOSPITAL DEMAND FOR SERVICES

Hospitals agree to purchase
from HemaCare all Allogeneic units of blood and blood products collected and produced on its behalf (including FFP) through the
USC Blood Donor Center and/or Community Mobile Blood Drives, as shown below:

Monthly Volumes:

|Hospital                               | # Allogeneic RBC's Per Month (a) | # Allogeneic Leukoreduced EEC's Per Month (b) | Allogeneic Red Blood Cells (a+b) | # FFP Per
        Month | # Single Donor Platelets per Month
|-------------------------------------- | -------------------------------- | --------------------------------------------- | -------------------------------- | ----------------------- | ----------------------------------
|USC/Norris Comprehensive Cancer Center | [l]2                             | [l]                                           | [l]                              | [l]                     | [l]                               
|USC University Hospital                | [l]                              | [l]                                           | [l]                              | [l]                     | [l]                               
|Total                                  | [l]                              | [l]                                           | [l]                              | [l]                     | [l]                               



1.Hospital purchases may be combined to equal total monthly volumes.

2.The Hospitals will accept the first [l] allogeneic
Red Blood Cells, the first [l] allogeneic leukoreduced Red Blood Cells, and the first
[l] units of FFP per month. If Hospitals cannot use the minimum number of units, but
are obligated to purchase units, Hospitals have the right to direct purchased (unused) units to another Southern California hospital
in Los Angeles or Orange Counties. The quantity and the schedule of delivery of the blood products shall be determined by Hospitals.
In no circumstances, however may delivery extend beyond seven days of date of product availability.

3.The Hospitals guarantee to purchase from HemaCare a minimum of [l]
Leukocyte Reduced Single Donor Platelets per month. If Hospitals do not purchase [l]
Single Donor Platelets monthly, the Hospitals will be billed for each unit not purchased up to [l]
units per month.








2
Terms represented by this symbol are considered confidential. These confidential terms have been omitted pursuant to a Confidential
Treatment Request filed with the SEC and have been filed separately with the SEC.