When the coronavirus hit, why were countless Americans left unprotected amid a desperate shortage of PPE and other critical medical equipment?

FRONTLINE, The Associated Press and the Global Reporting Centre investigate.

In the wake of President Donald Trump’s COVID-positive diagnosis, and as cases spike in parts of the country, “America’s Medical Supply Crisis” examines why the United States was left vulnerable to key equipment shortages — and why problems persist, months into the coronavirus crisis.