BBC and vitamin D

<15 nmol/L v ≥75 nmol/L

33% reduction in hospitalization with acute respiratory infections, (upper and lower)

Covid
Influenza
Bronchitis
Pneumonia

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Vitamin D deficiency linked to hospital admissions

https://www.bbc.com/news/articles/czx3g1d57xpo

University of Surrey

People with a severe vitamin D deficiency (below 15 nmol/L), a third more likely to be admitted to hospital with conditions including bronchitis and pneumonia.

(15 nmol/L is 6 ng / ml)

Abi Bournot, (lead author)

"antibacterial and antiviral properties" of vitamin D are thought to help reduce the risk of respiratory tract infections."

Improves immune recognition
Supports T and B cell response
Reduces excessive pro-inflammatory cytokines

Promotes production of antimicrobial peptides against bacterial infections.

Enhances antiviral white cell function, e.g. promotes interferon reserves

"This research attaches hard data to support the theory.

"Despite its importance to our overall health, many people are deficient and do not meet the government's recommended intake of 10 microgrammes of vitamin D per day."

(10 micrograms is 400 iu)