Ted Lieu actually said...

Congressional subpoenas essentially are rendered meaningless if we can’t enforce them because it takes years to do so.

I believe we need to execute the inherent contempt power of the House of Representatives.

In a high-lethality pandemic, would the FDA have authority to do this, or would there need to be a change to a law?

So, yes, vaccines are always going to be one of the cornerstones for medical countermeasures.