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Showing posts with label Infections. Show all posts
Showing posts with label Infections. Show all posts

Thursday, August 13, 2020

Every Decision Is A Risk. Every Risk Is A Decision.

Maggie Koerth
fivethirtyeight.com
Originally posted 21 July 20

Here is an excerpt:

In general, research has shown that indoors is riskier than outside, long visits riskier than short ones, crowds riskier than individuals — and, look, just avoid situations where you’re being sneezed, yelled, coughed or sung at.

But the trouble with the muddy middle is that a general idea of what is riskier isn’t the same thing as a clear delineation between right and wrong. These charts — even the best ones — aren’t absolute arbiters of safety: They’re the result of surveying experts. In the case of Popescu’s chart, the risk categorizations were assigned based on discussions among herself, Emanuel and Dr. James P. Phillips, the chief of disaster medicine at George Washington University Emergency Medicine. They each independently assigned a risk level to each activity, and then hashed out the ones on which they disagreed.

Take golf. How safe is it to go out to the links? Initially, the three experts had different risk levels assigned to this activity because they were all making different assumptions about what a game of golf naturally involved, Popescu said. “Are people doing it alone? If not, how many people are in a cart? Are they wearing masks? Are they drinking? …. those little variables that can increase the risk,” she told me.

Golf isn’t just golf. It’s how you golf that matters.

Those variables and assumptions aren’t trivial to calculating risk. Nor are they static. There’s different muck under your boggy feet in different parts of the country, at different times. For instance, how safe is it to eat outdoors with friends? Popescu’s chart ranks “outdoor picnic or porch dining” with people outside your household as low risk — a very validating categorization, personally. But a chart produced by the Texas Medical Association, based on a survey of its 53,000 physician members, rates “attending a backyard barbeque” as a moderate risk, a 5 on a scale in which 9 is the stuff most of us have no problem eschewing.

The info is here.

Wednesday, August 12, 2020

San Quentin’s coronavirus outbreak shows why ‘herd immunity’ could mean disaster

A condemned prisoner touches the mesh fence in the exercise yard during a media tour at San Quentin State Prison.Rong-Gong Lin II and Kim Christensen
The Los Angeles Times
Originally published 11 August 20

Here are two excerpts:

San Quentin is an imperfect setting to help understand when herd immunity might be achieved. Prisons are crowded settings that will promote coronavirus transmission more so than among people in other settings, like those who live in single-family homes.

But the San Quentin experience — as well as other data — does show that, in the absence of a vaccine, “in order to get to something that approaches herd immunity, we’re going to have to get something well on the far side of 50% of people infected,” Rutherford said. “Which comes with a resultant large cost in mortality and severe morbidity.

“If you believe the San Quentin stuff, you got to get up to way-up-there before you start seeing slowing of transmission,” Rutherford said.

Dr. Anthony Fauci, the U.S. government’s top infectious diseases expert, last week guessed it will probably require 50% to 75% of a population to be immune before achieving herd immunity — a goal that should be achieved not just through infected people recovering but also through vaccination.

California has a long way to go before the vast majority of residents have been infected.

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Sweden famously pursued a herd immunity strategy when it decided not to impose a severe lockdown.

But now, Sweden has among the highest mortality rates among European countries, and has a worse rate than that of the United States.

The info is here.