JAK2 Mutation

The goal of this clinical trial is to learn if the drug ropeginterferon alfa-2b can be used safely to treat patients with a JAK2 mutation and high risk features, but do not yet have a myeloproliferative neoplasm. The main questions it aims to answer are: * Can we enroll 12 patients with JAK2 mutations and high risk features without a myeloproliferative neoplasm on a clinical trial evaluating the drug ropeginterferon? * Is ropeginterferon safe to use in these patients? Participants will: * Receive ropeginterferon as an injection under the skin once every 4 weeks * Visit the clinic every 1-3 months for checkups and tests