He's not the Hector buried in Cinderford aged 9 in 1930 by any chance ??

There was a Polio peak in 1937/38 and then again in 1947/48 the later due to servicemen returning from afar... ( and 1938 was the year Lord Nuffield donated "iron lungs" to hospitals - I think the comparison was they cost approx. the same as a typical house)

I have a feeling Polio was an isolation case so - Over Hospital Gloucester, or Ham Green Bristol would be where I might expect to find him being treated.

Ther was a TB clinic run out of Cinderford and the small isolation unit at Green Bottom, but I think smallpox was its focus.

I've found a Clifford who is registered in Bristol Q4 1936 age 0, looks like born Q1 Bristol ? - do you know the christian name ?