A new coronavirus was spreading in the U.S., and with social distancing orders going into place, talk immediately turned to finding a treatment that could stop the spread. In Maryland, companies jumped into action. Work began on a vaccine at Gaithersburg-based Novavax, and the company partnered with Emergent Biosolutions on initial development and manufacturing. Gaithersburg’s Altimmune is also developing a vaccine, and announced plans last week for a preclinical testing collaboration with the University of Alabama Birmingham.