We have removed the balconies from hospitals that were used in the past to give patients the benefits of sensible sun exposure and improve vitamin D status although this may have helped reduce the incidence of nurses back problems and a reduction in the need for wards persons it may have also reduced the chances of recovery in hospital for some.
The idea of a need for correct and sensible sun exposure is not new. The Hydro Majestic Hotel, in the Blue Mountains NSW was originally Australia's first health retreat and Naturopathic Hospital (around 1903) that under direction of Dr George Baur as the chief medical doctor, formerly of the "Shoeneck" health spa on Lake Lucerne in Switzerland developed a program of diets and some weird and wonderful treatments that included regular safe sun exposure, good eating and regular bathing which was not a common occurrence.
This good lifestyle and sun exposure approach is not fully supported by our peak bodies who encourage DON'T go into the sun unless you cover up, apply a sun block and stay in the shade. It is no wonder that there is an increase in diseases associated with reduced immune function and low vitamin D status are on the increase.