Professor Luke O'Neill

A second piece of advice is, if a child is sick, try and keep them home because they won't go to the school to spread the infection to disadvantage another family.

You know, this kind of idea.

It can be hard to keep kids home, of course, when they're working parents.

But still, there's various things the Danish study concludes.

First of all, vaccination.

And secondly, try and keep sick kids at home to stop them spreading this.

And that will affect the earning potential of the second and third children.

In a family.

There you have it.

The science of sibling rivalry.

And my podcast is a Newstalk production available every Thursday wherever you get your podcasts.

Hello, Luke O'Neill here and welcome to Show Me The Science, my weekly podcast here with Newstalk.

Now, I do get loads of requests and keep them coming in.

Now, I'm trying to do them as much as possible.

And if stuff comes in that I know stuff about or I feel I can help with, I will certainly cover it.

And this week, Emma Foley has sent in a request to do psoriasis.

And I jumped at this one because I know all about psoriasis and I've done some work.

on psoriasis myself over the years.

And in fact, I have mild psoriasis myself and it's very, very common.

In Ireland, at least 5% of us have some kind of psoriasis.