Description: Search for mpox tests to learn your status.
veterinarians (248) cdc (162) infection control (162) monkeypox (17) mpox (6) hiv testing location (1) std testing location (1) viral hepatitis testing (1) poxvirus smallpox vaccine guidance
Search Submit Mpox Section Navigation CDC Home Mpox Vaccination Basics Español Print Minus Related Pages Mpox (formerly known as monkeypox) is caused by a virus that is related to the virus that causes smallpox. JYNNEOS is a 2-dose vaccine developed to protect against mpox and smallpox infections. People need to get both doses of the vaccine for the best protection against mpox. The second dose should be given 4 weeks after the first dose.
Vaccination is an important tool in stopping the spread of mpox. People who are vaccinated should continue to avoid close, skin-to-skin contact with someone who has mpox.
You had a severe allergic reaction (such as anaphylaxis) after getting your first dose of the JYNNEOS vaccine.