Two weeks into his tenure leading the FDA’s biologics center, Vinay Prasad has made his mark with a new framework for approving future Covid-19 vaccines that he feels will counteract existing “dogma.”

US regulators will no longer approve Covid booster shots for healthy adults and children without new studies, adding a costly requirement for drugmakers, though they will still be available for millions of high-risk Americans.

US regulators will no longer approve Covid booster shots for healthy adults and children without new studies, adding a costly requirement for drugmakers, though they will still be available for millions of high-risk Americans.

The FDA says the new approach will aim to balance a timely approval process for vaccines, while also weighing “the need for evidence" of their effectiveness for the masses.