Mpox After Exposure: When to Get JYNNEOS and When to Seek PCR Testing
If you may have been exposed to mpox, JYNNEOS post-exposure prophylaxis works best when started within 4 days (and may still help if given up to 14 days). If you develop a new, unusual rash after a relevant exposure window, contact a clinician promptly to ask about mpox PCR testing.
