Substandard and Falsified Medicines, Regulatory Capacity and Public Health: A Narrative Review With a Focus on Africa - Ahmed Vandy; Nancy Oluwakemi Samai; Onome Thomas Abiri; Michael Lahai; Fawzi Thomas; Tamba Buffa; Sheku Mansaray; Alvin Turay; Augustus Osborne (Public Health Challenges, 2026)