PHILADELPHIA-- Hemispherx Biopharma (NYSE AMEX:HEB) will provide an update on its Influenza research initiatives via teleconference on Wednesday, July 22, 2009, at 10:00 AM EDT. Initiatives to be discussed will include experimental programs planned or underway in Pacific Rim countries, Australia, South America and the United States. Background information may be sourced at Wall Street Journal, July 18/19, 2009, p. A3.

Hemispherx's Medical Director, CEO, and the Managing Director of the Sage Group, a health care consulting firm retained by Hemispherx, will participate. Investigational products and protocols to be discussed will include Hemispherx's Ampligen(r) (poly I: poly C12U), Alferon N (a natural cocktail of alpha 2 type interferons, FDA approved for treatment of refractory HPV) and Alferon LDO, an experimental formulation of Alferon-N for oral delivery.


To access the conference call:
U.S. Callers: 800-346-7359
International Callers: 973-528-0008
Conference Entry Code: 27781

This call will be webcast via the Company's website at: http://www.hemispherx.net.


A digital replay of the call will be available until August 5, 2009
by calling:
U.S. Callers: 800-332-6854
International Callers: 973-528-0005
Conference Entry Code: 27781

About Hemispherx Biopharma

Hemispherx Biopharma, Inc. is a specialty pharma company engaged in the manufacture and clinical development of new drug entities for treatment of seriously debilitating disorders. Hemispherx's flagship products include Alferon N Injection(r) (FDA approved for a category of sexually transmitted diseases) and the experimental therapeutics, Ampligen(r) and Oragens. Ampligen(r) and Oragens represent experimental RNA nucleic acids being developed for globally important debilitating diseases and disorders of the immune system. Hemispherx's platform technology includes large and small agent components for potential treatment of various severely debilitating and life threatening diseases. Hemispherx has in excess of 50 issued patents comprising its core intellectual property estate and a fully commercialized product (Alferon N Injection(r)). The Company wholly owns and exclusively operates a GMP certified manufacturing facility in the United States for commercial products. For more information please visit www.hemispherx.net.