Hepatitis Treatment Market Size & Forecasts 2026-2035, By Segments (Route of Administration, End-user, Disease Type, Treatment Type), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Gilead Sciences, Bristol-Myers Squibb, Merck, Roche, AbbVie)