On 28th July 1937 the Sydney Morning Herald carried an article headed DIPHTHERIA CAMPAIGN. The tome stated that the campaign to combat the disease had begun in the Blue Mountains by the then Blue Mountains Shire Council. In Springwood 180 children were treated and children at Blaxland and Glenbrook were next.
Diphtheria, a leading cause of death among children, was known as the "strangling Angel of Children" and affected children in epidemic proportions until intervention by vaccination.
Ref: Sydney Morning Herald 28.7.1937
Pamela Smith BA (Hons) Hist. Adv. Dip. LFAH