years ago you could get a vitamin d blood test on the nz health system. Now you have to pay for it which i have done for many years now as it has been well known for decades the importance of optimal blood levels of vit d to fight all viruses and to modulate the immune system.
Yet another study shows the importance of Vitamin D
But our 
show of government health bureaucrats never mention this
and instead arrest old ladies sitting on park benches & chase people off beaches
For its all about the experiment 
https://academic.oup.com/jcem/advance-article/doi/10.1210/clinem/dgab439/6303537 …pic.twitter.com/Awi0YzNs3B
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Which is why I take 10,000 iu every day.
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