What should you know about an mRNA herpes vaccine?

mRNA is a temporary set of instructions used by cells to make a selected protein. The immune system studies that protein and can develop a memory response. The mRNA is then broken down by the body; it does not alter a person’s genes. A herpes vaccine may be designed for prevention, reduction of recurrences, or both, depending on the product and its regulatory status. Herpes viruses can remain in the body after infection, so vaccination is not the same as treating an established infection.

Check whether a vaccine is authorised and available for your specific herpes virus and purpose. Tell the clinician about prior herpes infection, pregnancy or plans for pregnancy, immune conditions, allergies, and medicines. Keep a record of previous vaccines and reactions. If you have sores, avoid skin-to-skin or sexual contact with the affected area until a clinician advises that it is appropriate; a vaccine does not replace testing or treatment for current symptoms.

Arrange medical advice for new blisters, painful ulcers, unexplained genital symptoms, eye pain or redness, or sores near the eye. Seek urgent care for severe eye symptoms, confusion, weakness, trouble breathing, or a rapidly worsening illness. People with weakened immunity, newborn exposure, or pregnancy should contact a clinician promptly after concerning symptoms or a possible exposure.

Ask which herpes virus the vaccine targets, whether it is authorised for your situation, what protection it is intended to provide, and whether you still need screening, condoms, antiviral treatment, or follow-up. Ask about the recommended schedule, expected local or whole-body reactions, and what to do if you develop symptoms after vaccination.