Novavax's vaccine is made of tiny particles studded with the coronavirus spike protein plus honeycomblike molecules, derived from plants, that stimulate the immune system.Image of Novavax's tiny particles studded with coronavirus spike proteinsEighteen months ago, a small vaccinemaker here called Novavax faced an existential threat: delisting by the NASDAQ stock index. On the heels of a second failed vaccine trial in less than 3 years, the firm's shares had plunged to less than $1 for 30 straight days, triggering a warning by NASDAQ. Frantic to conserve cash, the company sold its two Maryland manufacturing facilities, slicing its payroll by more...