1. Pregnant or lactating women, 2. Patients who cannot be inhaled by atomization, 3. Patients who are intolerant or allergic to interferon preparations, 4. Other patients were judged unsuitable for inclusion in the trial by researchers.

1. Pregnant or lactating women, 2. Patients who cannot be inhaled by atomization, 3. Patients who are intolerant or allergic to interferon preparations, 4. Other patients were judged unsuitable for inclusion in the trial by researchers.