Aiming to simplify the explanation for severe disease in COVID-19. Through research the pathophysiology of COVID-19 is related to levels of serum ACE-2 in the blood stream.<br /><br />This principle helps us to understand why certain groups are targeted through this viral infection.<br /><br />More detailed presentation is available at McMillan Research.<br /><a href="https://mcmillanresearch.com/" target="_blank" rel="nofollow">https://mcmillanresearch.com/</a><br /><br />source: <a href="https://youtu.be/W4XQJ4dHwFE" target="_blank" rel="nofollow">https://youtu.be/W4XQJ4dHwFE</a>