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This is the show where we bring you science.

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Without further ado, this is the naked scientist.

Hello, welcome to the naked scientist.

This is the show where we bring you the latest breakthroughs in science, technology and medicine.

I'm Chris Smith. And I'm James Titco. This week, 1 million children are to be offered

polio boosters in London. We'll hear why. What can we do to counter heat waves and droughts and the robot teaching ants to navigate? Across London over a million children age 1 to 9 will be offered a

polio virus vaccine in the coming months. This has been announced

following the detection over a number of months now of

polio virus in sewage samples collected from a number of London boroughs.

It indicates spread of the virus in the community, which in turn points to insufficient levels of immunity in the population.

Now, Chris, you're a virologist, we'd be amiss not to lean on your expertise here.

What's actually been detected in the sewage samples?

Well, going back over the last few months, the sampling which is done routinely on sewage in London,

also it's carried out in Glasgow, has picked up traces of the genetic material from polio virus but not what

we call the wild type virus it's actually vaccine we've got three different types

of polio virus that we have vaccines against and they are weakened

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