Some best practices for securely handling sensitive information when using cookies in a React application include:

1.  Using **HTTPS** to encrypt data in transit.
2.  Setting the **"secure"** and **"httpOnly"** attributes on cookies to prevent access by malicious scripts.
3.  Storing only the necessary information in cookies and avoiding sensitive data.
4.  Implementing measures to protect against cross-site scripting (XSS) attacks.
5.  Periodically rotating session tokens to prevent unauthorized access.
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