Moderately higher day - Gritstone and Generex with double digit gains.

A modestly higher day overall with a gain of 1.5%. There were 18 gainers and nine losers. 

Gritstone lead the way up with a gain of 13%. Generex picked up just under 11%.

Vir, PDS Bio and Altimmune all picked up just under 5%.

On the downside, Heat Biologics fell 10% and Dynavax fell 7%.