BEIJING – While repurposing drugs may be a quick solution to an epidemic like COVID-19 that has a limited research window, it’s just luck as to whether an already available drug candidate exists for newly emergent diseases. Experts say it’s more realistic to develop better drugs instead of attempting to repurpose old ones.

BEIJING – There was encouraging news when vaccine developer Moderna Inc. announced this week it that has shipped the first vials of its mRNA vaccine against COVID-19 for a phase I trial in the U.S. The vaccine was created just 42 days after the genetic sequence of the COVID-19 virus was released. That is record speed. Other vaccine developers are also working around the clock to respond to the epidemic.