In the years between two lethal pandemics, one the misnamed Spanish flu, the other COVID-19, the world learned about viruses, cured various diseases, made effective vaccines, developed instant communications and created elaborate public-health networks.
Yet here we are again, face-masked to the max. And still unable to crush an insidious yet avoidable infectious disease before hundreds of thousands die from it.
As in 1918, people are again hearing hollow assurances at odds with the reality of hospitals and morgues filling up and bank accounts draining.
The ancient common sense of quarantining is back. So is quackery: Rub raw onions on your chest, they said in 1918. How about disinfectant in your veins now? mused President Donald Trump, drawing gasps instead of laughs over what he weakly tried to pass off as a joke.
In 1918, no one had a vaccine, treatment or cure for the great flu pandemic as it ravaged the world and killed more than 50 million people. No one has any of that for the coronavirus, either.
Modern science quickly identified today's new coronavirus, mapped its genetic code and developed a diagnostic test, tapping knowledge no one had in 1918. That has given people more of a fighting chance to stay out of harm's way, at least in countries that deployed tests quickly, which the U.S. didn't.
But the ways to avoid getting sick and what to do when sick are little changed. The failure of U.S. presidents to take the threat seriously from the start also joins past to present.
Trump all but declared victory before infection took root in his country and he's delivered a stream of misinformation ever since. President Woodrow Wilson's principal failure was his silence.
Not once, historians say, did Wilson publicly speak about a disease that was killing Americans grotesquely and in huge numbers, even though he contracted it himself and was never the same after.
Wilson fixated on America's parallel fight in World War I like "a dog with a bone," says John M. Barry, author of "The Great Influenza." The suspected ground zero of the 1918 flu ranges from Kansas to China. But it was clear to U.S. officials even in 1918 that it didn't start in Spain.
The pandemic took on Spain's name only because its free press ambitiously reported the devastation in the disease's early 1918 wave while government officials and a complicit press in countries at war - the U.S. among them - played it down in a time of jingoism, censorship and denial.
Like COVID-19, the 1918 pandemic came from a respiratory virus that jumped from animals to people, was transmitted the same way, and had similar pathology, Barry said by email. Social distancing, hand-washing and masks were leading control measures then and now.
Medical advice from then also resonates today: "If you get it, stay at home, rest in bed, keep warm, drink hot drinks and stay quiet until the symptoms are past," said Dr. John Dill Robertson, Chicago health commissioner in 1918.