Around about 1930-1933, my mother (Eva Cornick, b.1927) and her brother (Billy, b.1922) caught scarlet fever, and were put in isolation at 'the Blyth fever hospital'. They may well be on the photo, but the jpeg resolution is too low to tell - do you have a higher resolution version? I can see two potential candidates for each of them.
Regards,
AllanH.