An official website of the United States government
Here’s how you know
The .gov means it’s official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
An infectious disease that is contagious and that can be transmitted either directly or indirectly from one source to another by an infectious agent or its toxins.