Word COVID-19. Abstract virus strain models of COVID-19 or Coronavirus pandemic, epidemic, concept, flu, infected, disease, syndrome, corona, pneumonia, protection, infection, infectious, wuhan, outbreak, text, hazard, chinese, ncov, health, medical, information, confirmed, global, dangerous, virus spread, who, word, name, inscription, microbiology, illness, superbug, treatment, influenza, sars, coronaviruses, asian flu, sickness, china