Video: Here's why a COVID-19 vaccine may not be enough

Shortages of toilet paper earlier this year showed just how fragile our global supply chain is when it is under duress. And as scientists around the world scramble to find a treatment for COVID-19, that fragility may prove to have even more dire consequences.

"It's not going to be sufficient just to get a viable vaccine," says distinguished professor Nada Sanders. A reliable supply of medical components, she says, is just as necessary.