Hemispherx Biopharma, Inc. has entered a preliminary agreement with GP Pharm for the manufacture of Ampligen in Argentina to serve Latin American markets upon approval. The agreement is a prerequisite to the company starting the manufacture of stability lots and stability testing necessary for approval to manufacture Ampligen, contingent upon ANMAT approval in Mexico.   In June 2010, the companies entered into a sales, marketing, distribution and supply agreement for Ampligen in certain Latin Am...