The next 17 top keywords with the strongest citation bursts were: angiotensin converting enzyme 2, inhibition, chloroquine, myocarditis, model, blockade, SARS-CoV, MERS-CoV, c reactive protein, severity, death, coronary artery disease, NF-κB, endothelial cell, cancer, admission, and body mass index. The gene discussed is ACE2; the disease is cancer.