One further factor, possibly the most crucial, was inherent to the way SARS-CoV affects the human body: Symptoms tend to appear in a person before, rather than after, that person becomes highly infectious. The headache, the fever, and the chills – maybe even the cough – precede the major discharge of virus toward other people.

— David Quammen

David Quammen Quotes

Viruses face four basic challenges: how to get from one host to another, how to penetrate a cell within that host, how to commandeer the cell’s equipment and resources for producing multiple copies of itself, and how to get back out – out of the cell, out of the host, on to the next. A.

— David Quammen

The purpose of this book is not to make you more worried. The purpose of this book is to make you more smart.

— David Quammen

From this perspective, the most serious outbreak on the planet earth is that of the species Homo sapiens.

— David Quammen

So you have density, infectivity, mortality, and recovery – four factors interrelated as fundamentally as heat, tinder, spark, and fuel. Brought together in the critical measure of each, the critical balance, they produce fire: epidemic.

— David Quammen

Another implication was that epidemics don’t end because all the susceptible individuals are either dead or recovered. They end because susceptible individuals are no longer sufficiently dense within the population.

— David Quammen

I think the virus is present all the time, within reservoir species,” he told me. “And sometimes there is transmission from reservoir species to other species.

— David Quammen

The result will be gradual transmutation of heritable forms, and adaptation to circumstances, by a process of selective culling. Eventually he gave the crank a name: natural selection. Twenty years passed after the E notebook entry. The world heard nothing about natural selection.

— David Quammen

If you look at the world from the point of view of a hungry virus,” the historian William H. McNeill has noted, “or even a bacterium – we offer a magnificent feeding ground with all our billions of human bodies, where, in the very recent past, there were only half as many people. In some 25 or 27 years, we have doubled in number. A marvelous target for any organism that can adapt itself to invading us.

— David Quammen

If SARS had conformed to the perverse pattern of presymptomatic infectivity, its 2003 emergence wouldn’t be a case history in good luck and effective outbreak response. It would be a much darker story.

— David Quammen

Will the Next Big One come out of a rainforest or a market in southern China?

— David Quammen

In other words, HIV hasn’t happened to humanity just once. It has happened at least a dozen times – a dozen that we know of, and probably many more times in earlier history.

— David Quammen

Any tiny little thing that people do,” Dwyer said, if it makes them different from one another, from the idealized standard of herd behavior, “is going to reduce infection rates.

— David Quammen

We should appreciate that these recent outbreaks of new zoonotic diseases, as well as the recurrence and spread of old ones, are part of a larger pattern, and that humanity is responsible for generating that pattern. We should recognize that they reflect things that we’re doing, not just things that are happening to us. We should understand that, although some of the human-caused factors may seem virtually inexorable, others are within our control.

— David Quammen

From the ecological point of view an outbreak can be defined as an explosive increase in the abundance of a particular species that occurs over a relatively short period of time.” Then, in the same bland tone, he noted: “From this perspective, the most serious outbreak on the planet earth is that of the species Homo sapiens.

— David Quammen

At the Chatou market in Guangzhou, for instance, he had seen storks, seagulls, herons, cranes, deer, alligators, crocodiles, wild pigs, raccoon dogs, flying squirrels, many snakes and turtles, many frogs, as well as domestic dogs and cats, all on sale as food.

— David Quammen

You could also buy leopard cat, Chinese muntjac, Siberian weasel, Eurasian badger, Chinese bamboo rat, butterfly lizard, and Chinese toad, plus a long list of other reptiles, amphibians, and mammals, including two kinds of fruit bat. Quite an epicure’s menu. And of course birds: cattle egrets, spoonbills, cormorants, magpies, a vast selection of ducks and geese and pheasants and doves, plovers, crakes, rails, moorhens, coots, sandpipers, jays, several flavors of crow.

— David Quammen

Human-caused ecological pressures and disruptions are bringing animal pathogens ever more into contact with human populations, while human technology and behavior are spreading those pathogens ever more widely and quickly. There are three elements to the situation.

— David Quammen

Vast areas of old forest have been cut, or chained down with bulldozers, to make way for cattle ranching and urban sprawl. People have planted orchards, established urban parks, landscaped their yards with blossoming trees, and created other unintended enticements amid the cities and suburbs. ‘So bats have decided that, as their native habitat is disappearing, as climate is becoming more variable, and their food source is becoming less diverse, it’s easier to live in an urban area.

— David Quammen

History is a fable agreed upon.

— David Quammen

Once a species of insect or bird has reached a new island and established a population, evolution toward gigantism does offer certain advantages: fat storage, thermal stability, and defense against predators, if there are any. But gigantism is also a way of becoming flightless, and flightlessness is a way of becoming marooned.

— David Quammen
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