Is the disruption of the Covid-19 shutdown really justified? Instead, what if we just let the virus run its natural course?

Mar 20, 2020 | 17 comments

An empty street in Manhattan.

By Justin Fox

Remember a week and a half ago when CNBC’s Rick Santelli said that “maybe we’d just be better off” if we just infected everybody with the coronavirus now? His reasoning:

Then in a month it would be over because the mortality rate of this probably isn’t going to be any different if we did it that way than the long-term picture, but the difference is we’re wreaking havoc on global and domestic economies.

Unlike his most famous rant, a February 2009 tirade against mortgage bailouts and in favor of a “Tea Party,” this one probably won’t help launch a political movement, given that Santelli apologized soon after and political sentiment here in the U.S. seemed to shift firmly in favor of a tougher virus-fighting effort in the days that followed.

But Santelli did raise a question that isn’t going away: how do we know we aren’t doing ourselves more harm with the measures we take to slow or halt Covid-19 than the disease would do to us on its own? As Stanford medicine and statistics professor John Ioannidis, a rather more serious commentator, put it in an essay for the science news site Stat this week, after acknowledging that the coronavirus could kill tens of millions worldwide if simply allowed to run its course:

With lockdowns of months, if not years, life largely stops, short-term and long-term consequences are entirely unknown, and billions, not just millions, of lives may be eventually at stake.

There are big problems with some of the claims made by Santelli and Ioannidis. Santelli is almost certainly wrong that “the mortality rate of this probably isn’t going to be any different” if a large share of the population contracts Covid-19 at the same time. It would likely be much higher because so many people with serious cases wouldn’t be able to get treatment, and the resulting death toll would probably drive a similar or even greater amount of economy-damaging self-quarantining and social distancing to what we’re seeing now, albeit it with a clearer and nearer end date.

Ioannidis, meanwhile, undercuts his argument that we need better data on the impact of the virus before making such monumental decisions by ignoring most of what is currently known about the impact of the virus. Ioannidis is best known for arguing that observational studies that purport to show negative health repercussions from eating meat or eggs are for the most part misdesigned and misleading, so his apparent suspicion of existing studies on Covid-19 death rates and other consequences is consistent. But the policy reaction so far seems to be based less on a close reading of those studies than on simple observation of what has happened in China’s Hubei Province, Iran and Northern Italy as the spread of the disease overwhelmed hospital capacity. Yes, governments are making huge decisions based on inadequate data. What else are they supposed to do?

As time goes by, though, we’re going to have more and better information, and the pressure on governments to justify their actions in cost-benefit terms should absolutely grow. To get a sense of the decisions to come, the latest report of the Covid-19 Response Team at Imperial College London, which is said to have helped persuade the U.K. and U.S. governments to embrace social distancing this week with its projection of 2.2 million deaths from the disease in the U.S. without it, is a good starting place.

That 2.2 million estimate is the result of mathematical modeling based on what is known so far about the disease’s deadliness, infectiousness and other properties. It doesn’t take into account “the potential negative effects of health systems being overwhelmed on mortality,” but it also assumes no changes in behavior in the absence of government edict. So maybe those would cancel each other out — or maybe not, given that study predicts that at the peak of the epidemic there would be demand for 30 times more critical-care beds in the U.S. than can currently be provided. In any case, 2.2 million deaths would amount to a very slightly larger share of the U.S. population than the 675,000 estimated to have died in the influenza pandemic of 1918. So much for a century of medical and technological progress!

On the other hand, at least the cases and deaths would under that scenario begin to decline after about three months.

Credit: Yahoo Finance,


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