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Still not sure about the need for Physical Distancing? Read this from Yale University.

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This is a statement from epidemiologist Jonathan Smith at Yale University.


Hey everybody, as an infectious disease epidemiologist, at this point I feel morally obligated to provide some information about what we are seeing from a transmission dynamic perspective, and how it applies to social distancing measures.

Like any good scientist I have noticed two things that are either not articulated or not present in the “literature” of social media.

Specifically, I want to make two aspects of these measures very clear and unambiguous.

First, we are in the very infancy of this epidemic’s trajectory. That means even with these measures we will see cases and deaths continue to rise globally, nationally, and in our own communities in the coming weeks.

Our hospitals will be overwhelmed; people will die that didn’t have to. This may lead some people to think that the social distancing measures

are not working. They are.

They may feel futile. They aren’t.

You will feel discouraged. You should. This is normal in chaos. But this is also the nature of a normal epidemic trajectory.

Stay calm.

The enemy we are facing is very good at what it does; yet we are not failing. We need everyone to hold the line as the epidemic inevitably gets worse.

This is not my opinion; this is the unforgiving math of epidemics for which I and my colleagues have dedicated our lives to understanding with great nuance, and this disease is no exception.

We know what will happen; I want to help the community brace for this impact.

Stay strong, and with solidarity know with absolute certainty that what you are doing is saving lives, even as many people get sick and others die.

You may feel like giving in. Don’t.

Second, although social distancing measures have been (at least temp- orarily) well-received, there is an obvious-but-overlooked phenomenon when considering groups (e.g., families) in transmission dynamics.

While social distancing decreases contact with members of society, it of course increases your contact with group (family) members. This small and obvious fact has surprisingly profound implications on disease transmission dynamics.

Study after study demonstrates that even if there is only a little bit of connection between groups (e.g., social dinners, playdates, playgrounds, etc.), the epidemic trajectory isn’t much different than if there was no measure in place.

The same underlying fundamentals of disease transmission apply, and the result is that the community is left with all of the social and economic disruption but very little public health benefit.

You should perceive your entire family to function as a single individual unit; if one person puts themselves at risk, everyone in the unit is at risk.

Seemingly small social chains get large and complex with alarming speed.

If your son visits his girlfriend, and you later sneak over for coffee with a neighbor, your neighbor is now connected to the infected office worker that your son’s girlfriend’s mother shook hands with.

This sounds silly, it’s not.

This is not a joke or a hypothesis. We as epidemiologists see it borne out

in the data time and time again and no one listens.

Conversely, any break in that chain breaks disease transmission along that chain.

In contrast to hand-washing and other personal measures, social distancing measures are not about individuals, they are about societies working in unison.

The results from these measures also take a long time to develop.

It is hard (even for me) to conceptualize how ‘one quick little get- together’ can undermine the entire framework of a public health intervention, but it does.

I promise you, it does. I promise. I promise. I promise.

You can’t cheat it. People are already itching to cheat on the social distancing precautions just a “little” – a playdate, a haircut, picking up a needless item at the store, etc.

From a transmission dynamics standpoint, this very quickly recreates a highly connected social network that nullifies all the work the community has done to that point.

Until we get a viable vaccine, this unprecedented outbreak will not be overcome in a grand, sweeping gesture. Rather, only by the collection of individual choices our community makes in the coming months.

This virus is unforgiving to unwise choices.

My goal in writing this is to prevent communities from getting ‘sucker- punched’ by what the epidemiological community knows will happen in the coming weeks.

It will be easy to be drawn to the idea that what we are doing isn’t working and become paralyzed by fear, or to ‘cheat’ a little bit in the coming weeks.

By knowing what to expect, and knowing the importance of maintaining these measures, my hope is to encourage continued community spirit, strategizing, and action to persevere in this time of great danger and uncertainty.

Link to this publication in the press can be found here.