Exhibit 99.1


Company Contact:                                     Media Contact:
Dianne Will                                          Digs Majumder
Hemispherx Biopharma, Inc.                           Neale-May & Partners
518-398-6222                                         212.213.5400 x 206
ir@hemispherx.net                                    digs@nealemay.com


   Hemispherx Biopharma, Inc. Announces Delay in Filing Its Form 10-K for the
                      Fiscal Year Ended December 31, 2005

Philadelphia,  PA., April 3, 2006 - Hemispherx Biopharma,  Inc. (AMEX: HEB) (the
"Company") announced today that it would not be filing its annual report on Form
10-K for the  fiscal  year ended  December  31,  2005,  on March 31,  2006,  the
extended due date.

During  the  preparation  of the  Company's  annual  report on Form 10-K for the
fiscal year ended December 31, 2005, after  discussions with the audit committee
and BDO Seidman,  LLP, the Company's  Independent  Registered  Public Accounting
Firm, and after doing additional analysis on guidelines set forth in EITF 00-27:
Application  of  Issue  No.  98-5 to  Certain  Convertible  Instruments,  it was
determined  that an  incorrect  accounting  principle  was  applied  to  certain
Debentures  and  Warrants  issued  between  March  2003 and August  2005,  which
impacted the  Company's  financial  statements  between March 2003 and September
2005, specifically,  the initial recording of the embedded conversion feature of
the Debentures and the related fair value of related warrants as well as certain
Debenture and Warrant price resets.

All of the above issues relate to accounting for  convertible  debt,  additional
paid-in capital and related non-cash financing  charges.  These non-cash charges
do not affect the Company's revenues, cash flows from past or future operations,
or its liquidity.

After  discussions with the audit committee and BDO Seidman,  LLP, the Company's
Independent  Registered  Public Accounting Firm, the Audit Committee agreed with
management's  recommendations and concluded that the previously issued financial
statements  included in the Forms 10-Q and Forms 10-K for the periods ended from
March 31, 2003 to December 31, 2005, should not be relied upon.

The  Company has filed its Form 10-K for the year ended  December  31, 2005 (the
"Report") without audited financial statements.  The anticipated restatements of
the Company's  financial  statements  for the years ended  December 31, 2003 and
2004 are contained therein. As audited financial statements are not contained in
the Report,  the Report does not satisfy all  requirements  under the Securities
Exchange Act and,  therefore,  is deficient.  Based on representations  from BDO
Seidman,  LLP,  the Company  anticipates  that it will file an  amendment to the
Report containing audited financial statements within the next 30 days, and file
its Forms 10-Q for the quarters ended March 31, 2005 and 2004, June 30, 2005 and
2004, and September 30, 2005 and 2004 as soon as practicable thereafter.
                                     -more-





About Hemispherx Biopharma
Hemispherx  Biopharma,  based in Philadelphia,  is a  biopharmaceutical  company
engaged in the  manufacture  and clinical  development  of new drug entities for
treatment of viral and immune-based  chronic disorders.  Hemispherx  Biopharma's
flagship     products     include     Alferon(R)     and    the     experimental
immunotherapeutics/antivirals   Ampligen(R)  and   Oragens(TM).   Alferon(R)  is
approved  for a category  of STD  infection,  and  Ampligen(R)  and  Oragens(TM)
represent  experimental  nucleic acids being  developed  for globally  important
viral  diseases  and  disorders  of the  immune  system.  Hemispherx's  platform
technology  includes large and small agent components for potential treatment of
various  chronic  viral  infections.  Hemispherx  has in excess  of 140  patents
comprising its core intellectual property estate, a fully commercialized product
(Alferon(R) N) and GMP certified  manufacturing  facilities for its novel pharma
products. For more information please visit www.hemispherx.net


Information  contained in this news release other than  historical  information,
should be considered  forward-looking and is subject to various risk factors and
uncertainties. For instance, the strategies and operations of Hemispherx involve
risk of competition,  changing market conditions, change in laws and regulations
affecting these industries and numerous other factors  discussed in this release
and in the Company's  filings with the Securities and Exchange  Commission.  Any
specifically referenced investigational drugs and associated technologies of the
company (including Ampligen(R),  Alferon(R) LDO and Oragens) are experimental in
nature  and as such  are not  designated  safe  and  effective  by a  regulatory
authority for general use and are legally available only through clinical trials
with the referenced  disorders.  The  forward-looking  statements  represent the
Company's  judgment  as of the  date of this  release.  The  Company  disclaims,
however,  any intent or obligation to update these  forward-looking  statements.
Clinical  trials  for  other  potential  indications  of the  approved  biologic
Alferon(R)  do not imply that the  product  will ever be  specifically  approved
commercially for these other treatment indications.