ViacomCBS 10-K 2006 FY Annual report

EXHIBIT 32.2

CERTIFICATION PURSUANT TO
SECTION 1350, CHAPTER 63 OF TITLE 18, UNITED STATES CODE,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to Section 1350, Chapter 63 of Title 18, United States Code, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned, as chief financial officer of ViaCell, Inc. (the “Company”), does hereby certify that to the undersigned’s knowledge:

(1) the Company’s Form 10-K for the period ended December 31, 2006 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in the Company’s Form 10-K for the period ended December 31, 2006 fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: March 16, 2007

/s/ Stephen G. Dance

Stephen G. Dance

Senior Vice President, Finance and

Chief Financial Officer