The second major difference is that COVID-19 causes more severe disease than seasonal influenza.
While many people globally have built up immunity to seasonal flu strains, COVID-19 is a new virus to which no one has immunity. That means more people are susceptible to infection, and some will suffer severe disease.
Globally, about 3.4% of reported COVID-19 cases have died. By comparison, seasonal flu generally kills far fewer than 1% of those infected.
Third, we have vaccines and therapeutics for seasonal flu, but at the moment there is no vaccine and no specific treatment for COVID-19. However, clinical trials of therapeutics are now being done, and more than 20 vaccines are in development.
And fourth, we don’t even talk about containment for seasonal flu – it’s just not possible. But it is possible for COVID-19. We don’t do contact tracing for seasonal flu – but countries should do it for COVID-19, because it will prevent infections and save lives. Containment is possible.