Thanks Robin and mrsd.

Yes, diet makes sense totally and smoking is a being shown more and more with various conditions to be a huge factor.

I can understand the diet more than I can with the over-cleanliness I guess. It's such an automatic (isn't it?) reaction to keep house spotless when there's a baby or toddler.

I think the ratio a few years ago here in Australia was 1 in 3 with childhood asthma. I think a bit of it here is to do with the terrain, where we mostly live on the green coastal belt of our nation but the winds blow in from the dry arid outback bringing not just dust but all that pollen as well. We're all really so overfed yet undernourished

Thanks for your replies.

Good to see you back, mrsd!