---
title: "The United States reportedly requires clinical testing for the COVID-19 vaccine Novavax, which closed down nearly 50%"
description: "The U.S. FDA has requested Novavax to conduct additional clinical trials for its COVID-19 vaccine, which may delay the full approval of the vaccine. Novavax's stock price fell more than 50% against th"
type: "news"
locale: "en"
url: "https://longbridge.com/en/news/237624361.md"
published_at: "2025-04-25T20:46:06.000Z"
---

# The United States reportedly requires clinical testing for the COVID-19 vaccine Novavax, which closed down nearly 50%

> The U.S. FDA has requested Novavax to conduct additional clinical trials for its COVID-19 vaccine, which may delay the full approval of the vaccine. Novavax's stock price fell more than 50% against the market trend. The FDA is seeking more data as part of a post-approval commitment, and the Novavax vaccine is currently available under conditional approval

The Wall Street Journal reported that after the U.S. Food and Drug Administration (FDA) requested Novavax (NVAX.US) to conduct another clinical trial for its COVID-19 vaccine, the full approval of the Novavax vaccine may be delayed, causing the company to close down more than 5% against the market trend.

Novavax stated that the U.S. Food and Drug Administration (FDA) is seeking more data as part of a "post-approval commitment," which typically involves studying the safety and efficacy of a product after it has been approved. The Novavax vaccine has been marketed under conditional approval

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> **Disclaimer**: This article is for reference only and does not constitute any investment advice.