The coronavirus disease 2019 (COVID-19) is a highly contagious transmittable disease caused by a recently discovered coronavirus. SARS-CoV-2. The COVID-19 is associated with a global "pandemic" health situation. In humans. https://epthysow8b4o.blog-kids.com/35131006/the-mediatory-role-of-challenge-and-threat-in-the-relationship-between-positive-thinking-skills-and-perception-of-excellent-performance-a-study-on-football-players