The Food and Drug Administration will no longer approve COVID-19 vaccines for healthy people under 65 without rigorous trials.

Novavax originally showed its vaccine was safe and effective in a 30,000-person clinical trial. The FDA had been on track to grant Novavax full approval – without restrictions -- by its April 1 target date, according to two people with direct knowledge of the situation who spoke on condition of anonymity to discuss confidential agency matters.

President Donald Trump's tax cut and spending bill faces a critical stress test on Wednesday as Republicans in the U.S. House of Representatives try to overcome internal divisions about cuts to the Medicaid health program and tax breaks in high-cost coastal states.