Origin of Covid-19: Why Wuhan lab of China continues to be prime suspect Origin of Covid-19: Why Wuhan lab of China continues to be prime suspect More and more people and countries after countries are now refusing to believe in the theory of natural origin of Covid-19. Reports say that the British spies believe that the Wuhan lab leak theory is feasible. advertisement The Wuhan lab leak theory surrounding coronavirus is again gaining traction in the world. (Reuters) Chorus is growing louder for finding the origin of Covid-19 that emerged from Chinese city Wuhan and engulfed the world as one of the most devastating pandemics. More and more people and countries after countries are now refusing to believe in the theory of natural origin of Covid-19.