Photos from the areas hardest hit by the novel coronavirus SARS-CoV-2 tell a story of disinfection: Trucks spraying streets and a phalanx of sanitation workers wearing backpack tanks fogging sidewalks, parks, and plazas in China, South Korea, Italy, and elsewhere. Countless recommendations admonish us to wash our hands and disinfect often-touched surfaces in our homes. But what is the most...

We all want to know everything about the latest coronavirus, from its mortality rate to its origins, incubation period and much more, and they still have blanks to fill in. Mortality rate? COVID-19, as the disease is known, is more lethal than the average seasonal flu, but less so than previous epidemics stemming from coronaviruses. We do not yet know its precise mortality rate. World Health...