Diffusion Pharmaceuticals LLC, of Charlottesville, Va., named David R. Jones chief medical officer and member of its scientific advisory board. It also named Guy M. Chisolm to the SAB.

Dynavax Technologies Corp., of Berkeley, Calif., added Brant Biehn as chief commercial development officer and William Heyward as vice president of clinical research.

Genzyme Corp., of Cambridge, Mass., named Ron Branning senior vice president of global product quality.

GeoVax Labs Inc., of Atlanta, appointed Mark J. Newman vice president of research and development.

ImmuCell Corp., of Portland, Maine, added Bobbi Jo Kunde as director of sales and marketing.

Inovio Biomedical Corp., of San Diego, named Mark L. Bagarazzi chief medical officer.

IRX Therapeutics, of San Francisco, named Neil L. Berinstein chief scientific officer.

Jennerex Inc., of San Francisco, appointed Hoyoung Huh to its board.

MacroGenics Inc., of Rockville, Md., appointed Anastasia Daifotis senior vice president of clinical development.