It's technically possible and it is being done in labs, ... The next step would be for drug manufacturers to make that technology workable on a mass level and guarantee the quality of product.

It takes into account the real world.

We have no real capacity to make [a pandemic] vaccine right now.

Once pandemic strains are widespread, it doesn't make any sense to impose travel restrictions. You simply can't contain the flu with travel restrictions.

The school itself plays a big role. It's just a massive mixing ground for respiratory illness.