Matt Ridley

With a laboratory leak in Wuhan looking more and more likely as the source of the Covid pandemic, the Chinese authorities are not the only ones dismayed. Western environmentalists had been hoping to turn the pandemic into a fable about humankind’s brutal rape of Gaia. Even if “wet” wildlife markets and smuggled pangolins were exonerated in this case, they argued, and the outbreak came from some direct contact with bats, the moral lesson was ecological. Deforestation and climate change had left infected bats stressed and with nowhere to go but towns. Or had driven desperate people into bat-infested caves in search of food or profit. Green grandees were in no doubt of this moral lesson. “Nature is sending us a message.

Two years in, there is no doubt the Covid pandemic began in the Chinese city of Wuhan. But there is also little doubt that the bat carrying the progenitor of the virus lived somewhere else. Central to the mystery of Covid’s origin is how a virus normally found in horseshoe bats in caves in the far south of China or south-east Asia turned up in a city a thousand miles north. New evidence suggests that part of the answer might lie in Laos. The search for viruses closely related to Sars-CoV-2 took a new turn in September when a team of French and Laotian scientists found one in a horseshoe bat living in a cave in the west Laotian province of Vientiane. Other related viruses had been found in Cambodia, Thailand, Japan and elsewhere in China, but this one, Banal-52, was different.

China’s President Xi Jinping has apparently not yet decided whether to travel to Glasgow next month for the big climate conference known as COP26. That is no doubt partly because he’s heard about the weather in Glasgow in November, and partly because he knows the whole thing will be a waste of his time. After all, the fact that it is the 26th such meeting and none of the previous 25 solved the problem they set out to solve suggests the odds are that the event will be the flop on the Clyde. But another reason he is hesitating was stated pretty explicitly by his Foreign Minister, Wang Yi: ‘Climate cooperation cannot be separated from the general environment of China-US relations.

With a laboratory leak in Wuhan looking more and more likely as the source of the pandemic, the Chinese authorities are not the only ones dismayed. Western environmentalists had been hoping to turn the pandemic into a fable about humankind’s brutal rape of Gaia. Even if ‘wet’ wildlife markets and smuggled pangolins were exonerated in this case, they argued, and the outbreak came from some direct contact with bats, the moral lesson was ecological. Deforestation and climate change had left infected bats stressed and with nowhere to go but towns. Or it had driven desperate people into bat-infested caves in search of food or profit. Green grandees were in no doubt of this moral lesson. ‘Nature is sending us a message.

It is mystifying to me that organic food is still widely seen as healthier, more sustainable and, most absurdly, safer than non-organic food. Following the publication of part two of Henry Dimbleby’s National Food Strategy last week, the organic movement was quick to suggest that organic food and farming offer a way to achieve the strategy’s vision. ‘The recommendations of the National Food Strategy offer genuine hope that by embracing agroecological and organic farming, and adopting a healthier and more sustainable diet, we can address the climate, nature and health crises,’ said Helen Browning, chief executive of the Soil Association, Britain’s most vocal organic lobbying organisation.

In the genetic diaspora of an epidemic, there is ferocious competition between strains of virus to get to the next victim first. That leads to apparently purposeful outcomes, as if the virus had a mind. One of the things people find hardest to grasp about evolution is that it appears purposeful but the mutations on which it feeds are random. How come dolphins evolved to swim if all they had to work with were random changes in genes? Viruses also mutate at random — but most people talk as though the rise and fall of these mutant versions is mainly down to chance or luck. It’s not. Mutations occur all the time in RNA viruses; what matters is which ones find favour in natural selection.

‘I don’t think that word means what you think it means,’ says the Spaniard Inigo Montoya in the film The Princess Bride, when Vizzini keeps saying it is ‘inconceivable’ that the Dread Pirate Roberts is still on their tail. I muttered those words to myself during a parliamentary debate just before the start of the latest lockdown, when the minister twice said that the wave of infections was increasing ‘exponentially’. Far from increasing, let alone exponentially, the data showed that the wave was faltering if not cresting already. The lockdown came in on a Thursday.

Ever since Giacomo Pylarini, a physician working in the Ottoman Empire, sent a report to the Royal Society in 1701 that Turkish women believed pus from a smallpox survivor could induce immunity in a healthy person – and was dismissed as a dangerous quack – inoculation has been as much an art as a science. But it has proven to be the greatest life-saver of all time, eliminating smallpox and suppressing many other diseases. In Pylarini’s prescient words, it is 'an operation invented not by persons conversant in philosophy or skilled in physic, but by a vulgar, illiterate people; an operation in the highest degree beneficial to the human race.' It looks like a vaccine is probably going to work against Covid.

It is counterintuitive but the current spread of Covid may on balance be the least worst thing that could happen now. In the absence of a vaccine, and with no real prospect of eradicating the disease, the virus spreading among younger people, mostly without hitting the vulnerable, is creating immunity that will eventually slow the epidemic. The second wave is real, but it is not like the first. It would be a mistake to tackle it with compulsory lockdowns (even if called ‘circuit breakers’), whether national or local. The cure would be worse than the disease. If you cannot extinguish an epidemic at the start, the best strategy is for the healthy to get infected first. Lockdowns ensure that the vulnerable and the healthy both get infected with similar probability.