Drug shortages in the US are forcing physicians and the public to scramble for access to vital medicines. While the problem isn’t new, the number of products in scarce supply is nearing an all-time high — and could get worse as generic drug makers pare back on the breadth of products they manufacture or even shut down. The issue has gotten serious enough to be deemed a national security threat, and President Joe Biden’s administration has formed a team to try to address the issue.