Tell us about the story between the Salk and the Sabin vaccines and how they developed and what the advantages of either were and how it's influenced us for the future with the COVID vaccines and things.

Thank you, Gavin.

Yes, mentioned that President Roosevelt of the US had polio and was a very famous person, but it actually should say when you look at the history of celebrities that have had polio, there's quite a number of people that just it gives you an idea again about how it didn't discriminate.

Anyone may have been exposed and at risk.

So in the twentieth century, with epidemics occurring many places and then having President Roosevelt with polio, there then became a campaign to do something about polio to address it.

And I believe in the US, it was called the March of Dimes to try and just collect ten cent pieces or dimes to try and find a solution from that.

And I believe there was also a an institute called the in Institute for Infantile Paralysis, which was one of the names given for polio at one point.

Is it just Australia, or is it elsewhere in the part of the world?