Very positive day - Altimmune and Dynavax lead the way. Emergent crushed.

Very strong day for many COVID VACCINE STOCKS. Fully 20 had positive days while seven fell. The average stock gained 2.6%. 

Altimmune lead the way with an over 13% gain. Dynavax also had a double digit gain, up 10%. Several other companies also had particularly strong days: NanTKwst, Vaxart, Novavax, VBI, iBio and PDS Bio.

The outlier was Emergent Bio which got crushed today - one of its worst days all time, falling almost 14%.