Interferon discontinued for one month, a negative test is mostly accurate. If the body has a viral infection, the use of interferon for immunomodulation, stopping the drug for one month after the test negative most of the accurate, that the body has been functionally restored, the virus has been cleared, has now turned negative, you can wait until 3 months, 6 months time to re-check, if the test results are negative, you can be sure that it has been restored. Usually pay attention to personal life, hygiene habits, early to bed, early to rise more exercise, improve their own immune system, there are diseases should be timely medical treatment, drugs should be used under the guidance of a professional doctor. Avoid using drugs indiscriminately, so as not to cause adverse reactions.