Another company focused on severe respiratory complications of COVID-19 is La Jolla, Calif.-based Calcimedica Inc., which started a phase IIa study with its small-molecule calcium release-activated calcium (CRAC) channel inhibitor, CM-4620-injectable emulsion (IE), in patients with severe pneumonia who are at risk for ARDS. The company received a “Study May Proceed” letter from the FDA earlier this month and the trial began April 8.