Welcome to the PRIOH-1 investigational study website. The PRIOH-1 study is a clinical trial for people who are immunocompromised either due to a medical condition or medications or treatments and are living with herpes simplex virus (HSV-1 and HSV-2).

Click on one of the language options below to learn more about the PRIOH-1 study and to find a study clinic near you.
Belgium - Dutch
Belgium - French
Israel
United Kingdom
Australia
Germany
English- US
English