Question
Does every new annual flu disproportionately cause death in all non-Northeastern European ethnic groups; and not based on genetics directly, but based on diet and culture of both Vitamin D fortification and consumption of milk?
Vitamin D may not cure the flu once you have it, but the weight of scientific evidence is that a Vitamin D deficiency makes you greatly more susceptible.
Observations
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The China flu disproportionately infects the old over the young, in fact the youngest seem immune
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The China flu disproportionately infected Chinese and Italians, according to the news
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Nordic nations such as Sweden viewed themselves as immune to the China flu and declined to order nationwide lockdowns
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Senior citizens at some nursing homes have had shockingly high infection and death rates.
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Hollywood stars such as Whoopi Goldberg have described the China flu as disproportionately affecting African Americans.
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New York City has been hit the hardest, according to the news, and it is America’s most Jewish of our large northern cities and in general has one of the highest proportions of non-Northern Europeans.
Knowns
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Harvard: Study confirms vitamin D protects against colds and flu https://news.harvard.edu/gazette/story/2017/02/study-confirms-vitamin-d-protects-against-cold-and-flu/
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Vitamin D fortified milk consumption within the US by age and race aligns with China flu immunity and deaths
https://www.ars.usda.gov/ARSUserFiles/80400530/pdf/DBrief/3_milk_consumption_0506.pdf
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China is ranked 137th in the world by nation in milk consumption
https://en.wikipedia.org/wiki/List_of_countries_by_milk_consumption_per_capita
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The top 5 nations for milk consumption: Finland, Montenegro, Netherlands, Sweden, Switzerland
https://en.wikipedia.org/wiki/List_of_countries_by_milk_consumption_per_capita
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Only a few nations fortify milk with Vitamin D: Finland, Norway, Sweden, Canada and the USA
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6116165/
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Italians rarely drink milk, never with meals, and drink raw milk not fortified with Vitamin D when they do
https://www.disgracesonthemenu.com/2011/01/theres-milk-and-milk.html
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Both Italians and Greeks have a high prevalence of lactose intolerance, likely further decreasing their cultural affinities with drinking milk
https://en.wikipedia.org/wiki/Lactose_intolerance
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Africans, Asians, Native Americans, Southern Europeans and Ashkenazi Jewish people have the highest prevalence of lactose intolerance (and is in a northern climate), so within the US, these groups may have lower than average Vitamin D exposure. This perhaps could explain the disparate impact of the China flu on New York City.
https://en.wikipedia.org/wiki/Lactose_intolerance
https://www.haaretz.com/science-and-health/.premium-12-facts-about-jewish-genetics-1.5375744
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316196/
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Americans with the greatest Vitamin D deficiencies are nursing home residents, unless the home fortifies their meals with Vitamin D (homes that didn’t could face severe liabilities)
https://www.ncbi.nlm.nih.gov/pubmed/29017462
https://www.mdedge.com/familymedicine/article/29856/geriatrics/many-elderly-particularly-nursing-homes-lack-vitamin-d
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The market for influenza vaccines globally is estimated to be about $4 billion and growing
https://www.cnbc.com/2015/10/19/the-16-billion-business-of-flu.html