Which of the following is a non-viral method to treat infections?

Antifungal treatment is a non-viral method to treat infections because it specifically targets fungal pathogens that cause various conditions, such as athlete's foot, thrush, and systemic fungal infections. These antifungal agents work by disrupting the cell membranes of fungi or inhibiting their growth and reproduction. This approach is distinct from antivirals, which are focused on treating infections caused by viruses, and vaccinations, which are preventive measures designed to stimulate an immune response against viruses. Homeopathy, while an alternative treatment approach, does not have a scientifically supported mechanism for treating infections in the same way that antifungal agents do. Thus, antifungal treatment is the correct answer as it directly addresses infections caused by fungi without involving viral mechanisms.