Novavax (NASDAQ:NVAX) stock has more than doubled today and is up more than 120% at the time of this writing. This morning, the company announced a co-exclusive licensing agreement with Sanofi (NASDAQ:SNY) to commercialize its Covid-19 vaccine. The agreement will also provide Sanofi with a sole license to the vaccine for use in combination with its flu vaccines.On top of that, Sanofi will receive “a non-exclusive license to use Novavax’s adjuvanted COVID-19 vaccine for use in combination with non-flu vaccin ...