Novavax Inc.’s COVID-19 vaccine was cleared by U.S. regulators, giving Americans another tool against the virus as cases start to rise again.

The U.S. Food and Drug Administration’s nod makes Novavax’s the first vaccine authorized for adults that mimics the protein that the coronavirus uses to enter cells.

The authorization gives unvaccinated adults "another option that meets the FDA’s rigorous standards for safety, effectiveness and manufacturing quality needed to support emergency use authorization,” said FDA Commissioner Robert Califf in a statement.