Oh yes, I had the sugar cube too... and then I had to have a booster and they didn't use the sugar, and I realise why they needed it 
Polio is a weird one. It's asymptomatic in over 70% of cases, really mild in about 25% but serious and potentially life threatening in the rest (remind you of any other disease?!) and largely spread by the people who had it asymptomatically or mildly. And there doesn't seem to have been much rhyme or reason as to who got it seriously and who sailed through. My uncle had it badly in the late 40s and was in an iron lung for months, and has always had a slight limp as a result.
Was woken up at about 4.45 this morning by some ridiculously loud snow
. Thundersnow apparently. Its a Thing. Glad I wasn't on the school drop off this morning I have to say. It's quite icy.