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PODCAST

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Tim Harford explains - and sometimes debunks - the numbers and statistics used in political debate, the news and everyday life

science mathematics

All Episodes

9:06

Who Should be Quarantined?

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2020/06/20

Some countries are requiring new arrivals to self-isolate, a policy designed to stop infection spreading from areas of high prevalence to low prevalence. Tim Harford and Ruth Alexander find out which countries have the highest rate of Covid-19 infection. Plus, is it really true that the coronavirus mostly kills people who would die soon anyway?

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28:55

Quarantine, Test and Trace and BODMAS

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2020/06/17

The UK has introduced new rules requiring all people arriving in the country to self-isolate for 14 days. But given the severity of the UK’s outbreak can there be many places more infectious? Is it true that Covid-19 mostly kills people who would die soon anyway? The first figures are out showing how England’s Test and Trace programme is performing, but they contain a mystery we’re keen to resolve. And we play with some mathematical puzzles, courtesy of statistician Jen Rogers.

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27:56

Antibody tests, early lockdown advice and European...

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2020/06/10

At the start of March the government's Chief Scientific Adviser Sir Patrick Vallance said that the UK’s coronavirus outbreak was four weeks behind the epidemic in Italy. This ability to watch other countries deal with the disease ahead of us potentially influenced the decisions we made about which actions to take and when, including lockdown. So was he right?

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9:01

Keep your distance

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2020/06/06

What difference does a metre make? The World Health Organisation recommends that people keep at least 1 metre apart from each other to stop the spread of Covid-19, but different countries have adopted different standards. The US Centers for Disease Control and Prevention recommends staying six feet apart - that’s just short of 2 metres; in the UK, the rule is 2 metres. But all this has a big impact on the way businesses and societies get back to work. Tim Harford investigates the economic

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27:56

False negatives, testing capacity and pheasants

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2020/06/03

As lockdowns begin to lift the government is relying on testing and contact tracing programmes to prevent a second wave of Covid-19 infections. But how accurate are the swab tests used to diagnose the disease? The UK Statistics Authority has criticised the government for the way it reports testing figures, saying it’s not surprising that these numbers “are so widely criticised and often mistrusted.” We take a look at how the government achieved its target of developing a daily testing capacity of

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27:48

Obeying lockdown, flight arrivals and is this wave of...

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2020/05/27

More than 35,000 people in the UK have now officially died from Covid-19, but what does the data show about whether this wave of the epidemic is waning? We ask who respects lockdown, who breaks it, and why?Our listeners are astounded by how many people allegedly flew into the UK in the first three months of the year - we’re on the story. We look at the performance of the Scottish health system on testing. And some pub-quiz joy involving a pencil.

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8:58

60 Harvests and statistically savvy parrots

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2020/05/23

A listener asks if there can really only be 60 harvests left in Earth's soil. Are we heading for an agricultural Armageddon? Plus we meet the parrots who are the first animals, outside humans and great apes, to be shown to understand probability.(image: Kea parrots in New Zealand)

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28:06

School re-opening, Germany’s Covid-19 success and...

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2020/05/20

Risk expert David Spiegelhalter discusses whether re-opening some schools could be dangerous for children or their teachers. We ask what’s behind Germany’s success in containing the number of deaths from Covid-19. Many governments across the world are borrowing huge sums to prop up their economies during this difficult time, but with everyone in the same boat who are they borrowing from? Plus we revisit the UK’s testing figures yet again and meet some statistically savvy parrots.

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9:09

Social Distancing and Government Borrowing

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2020/05/16

As lockdowns start to lift, many countries are relying on social distancing to continue to slow the spread of coronavirus. The UK says we should stay 2 metres apart, the World Health Organisation recommends 1 metre, Canada six feet. So where do these different measurements come from? Plus, governments around the world are trying to prop up their economies by borrowing money. But with everyone in the same situation, where are they borrrowing from?

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27:38

Vitamin D, explaining R and the 2 metre rule

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2020/05/13

R is one of the most important numbers of the pandemic. But what is it? And how is it estimated? We return to the topic of testing and ask again whether the governments numbers add up. As the government encourages those who can’t work at home to return to their workplaces - we’re relying on social distancing to continue to slow the spread of the virus. But where does the rule that people should stay 2 metres apart come from? And is Vitamin D an under-appreciated weapon in the fight against

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8:59

Covid-19 fatality rate

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2020/05/09

The question of just how dangerous Covid-19 really is, is absolutely crucial. If a large number of those who are infected go on to die, there could be dreadful consequences if we relaxed the lockdowns that have been imposed across much of the world. If the number is smaller, for many countries the worst might already be behind us.But the frustrating thing is: we’re still not sure. So how can we work this crucial number out?

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27:55

Testing truth, fatality rates, obesity risk and...

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2020/05/06

The Health Minister Matt Hancock promised the UK would carry out 100,000 coronavirus tests a day by the end of April. He claims he succeeded. Did he? The question of just how dangerous the new coronavirus really is, is absolutely crucial. If it’s high, there could be dreadful consequences if we relaxed the lockdowns. So why is the fatality rate so difficult to calculate? Is it true that being obese makes Covid-19 ten times more dangerous? And whatis injuring more kids in lockdown, trampolines

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9:11

Climate change and birdsong

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2020/05/02

With much of the world’s population staying indoors, there are fewer cars on the roads, planes in the skies and workplaces and factories open. Will this have an impact on climate change? Plus as the streets become quieter, is it just us, or have the birds begun to sing much more loudly?

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28:05

Ethnic minority deaths, climate change and lockdown

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2020/04/29

We continue our mission to use numbers to make sense of the world - pandemic or no pandemic. Are doctors from ethnic minority backgrounds disproportionately affected by Covid-19? Was the lockdown the decisive change which caused daily deaths in the UK to start to decrease? With much of the world’s population staying indoors, we ask what impact this might have on climate change and after weeks of staring out of the window at gorgeous April sunshine, does cruel fate now doom us to a rain-drenched

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9:13

Comparing countries' coronavirus performance

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2020/04/25

Many articles in the media compare countries with one another - who’s faring better or worse in the fight against coronavirus? But is this helpful - or, in fact, fair?Tim Harford and Ruth Alexander discuss the limitations that we come across when we try to compare the numbers of Covid-19 cases and deaths in different countries; population size, density, rates of testing and how connected the country is all play a role.

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14:13

Bonus Podcast: Professor John Horton Conway

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2020/04/23

John Horton Conway died in April this year at the age of 82 from Covid-19 related complications. An influential figure in mathematics, Conway’s ideas inspired generations of students around the world. We remember the man and his work with mathematician Matt Parker and Conway’s biographer Siobhan Roberts.

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27:54

Comparing countries, the risk to NHS staff, and birdsong

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2020/04/22

We compare Covid-19 rates around the world. Headlines say NHS staff are dying in large numbers, how bad is it? And is it just us, or have the birds started singing really loudly?

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8:57

Superforecasting the Coronavirus

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2020/04/18

Scientific models disagree wildly as to what the course of the coronavirus pandemic might be. With epidemiologists at odds, Tim Harford asks if professional predictors, the superforecasters, can offer a different perspective.(Image: Coronovirus graphic/Getty images)

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8:58

Should you wear a face mask?

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2020/04/11

Do face masks stop you getting coronavirus? You might instinctively think that covering your mouth and nose with cloth must offer protection from Covid-19. And some health authorities around the world say people should make their own masks. But expert opinion is divided. Tim Harford and Ruth Alexander unpick the arguments.

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27:57

Coronavirus deaths, face masks and a potential baby boom

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2020/04/08

Is the coronavirus related death count misleading because of delays in reporting? Do face masks help prevent the spread of the virus? Was a London park experiencing Glastonbury levels of overcrowding this week? And after reports of condom shortages, we ask whether there’s any evidence that we’re nine months away from a lockdown-induced baby boom. Plus in a break from Covid-19 reporting we ask a Nobel-prize winner how many Earth-like planets there are in existence.

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