A down day, with a fall of 2.5% on average. Altimmune hit hard

A down day, with stocks falling 2.5% on average. There were 20 stocks up and six down. 

Altimmune got hit with a 14% hit. Nanoviricides fell almost 10% and Generex fell just under 8%. 

GeoVax was strong -- up almost 9% and Dynavax gained just over 6%.