Why is it said those with diabetes will be affected more than those without ?
"Individuals with diabetes are at increased risk of several pulmonary conditions (asthma, COPD, fibrosis, and pneumonia) but not lung cancer. This increased risk may be a consequence of declining lung function in patients with diabetes.
Chronic complications of diabetes include a number of pathological changes that involve small and large blood vessels, cranial and peripheral nerves, the skin, and the retina of the eye. The lung is also a target organ for diabetic microangiopathy in patients with both type 1 and type 2 diabetes (1), and decrements in lung function have been reported among patients with diabetes over the past two decades (2–9).
Decrements in the lung function of patients with diabetes are believed to be the consequence of biochemical alterations in the connective tissue constituents of the lung, particularly collagen and elastin, as well as microangiopathy due to the nonenzymatic glycosylation of proteins induced by chronic hyperglycemia (8,10). Alterations in collagen and elastin and microangiopathy result in thickening of the alveolar epithelial basal lamina, leading to reduced pulmonary capacity for the diffusion of carbon monoxide "
https://care.diabetesjournals.org/content/33/1/55
Old article but still relevant I think.
Diabetes effects the whole body including the lungs and covid 19 causes pneumonia.