Sandbox:ab
Thank you for your great work! There are only a few comments which may help you to improve the page.
You could follow abc format greatly
I think Dr. Gibson asked us not to make bold any part of the passage, if I am not mistaken. Some grammatical mistakes: In historical perspective: reffered :refereed struk down : struck centuary: century
blockage of cerebral artery: blockage of a cerebral artery.
Mao et. al. in his study first reported: Mao et al., in his study,(comma) 214 Covid-19 positive hospitalized patients. with COVID-19 in Wuhan: 214 Covid-19 positive hospitalized patients with COVID-19 in Wuhan (dot) Yaghi et. al. : Yaghi et al.
incidence of 0.9% : the incidence of 0.9%