Moan Johan, Dahlback Arne, Ma Liwei, Juzeniene Asta
Department of Radiation Biology; Institute for Cancer Research; the Norwegian Radium Hospital; Oslo University Hospital; Montebello, Oslo Norway.
Dermatoendocrinol. 2009 Nov;1(6):307-9. doi: 10.4161/derm.1.6.11357.
The annual death numbers of influenza and pneumonia in Norway were studied for the time period 1980-2000. No direct relationships were found with the variations of the annual UVB fluences, probably due to the fact that these variations did not exceed 30%. However, there was a very pronounced seasonal variation of both influenza deaths and pneumonia deaths, the vast majority occurring during the winter. Vitamin D levels were also estimated from several publications. The data support the hypothesis that a high vitamin D level, as that found in the summer, acts in a protective manner with respect to influenza as well as pneumonia. The findings are discussed and compared with data from tropical and subtropical areas.
对1980年至2000年期间挪威流感和肺炎的年度死亡人数进行了研究。未发现与年度中波紫外线通量的变化存在直接关系，这可能是因为这些变化未超过30%。然而，流感死亡人数和肺炎死亡人数均存在非常明显的季节性变化，绝大多数死亡发生在冬季。还从几份出版物中估算了维生素D水平。数据支持这样的假设，即夏季出现的高维生素D水平对流感和肺炎具有保护作用。对这些发现进行了讨论，并与热带和亚热带地区的数据进行了比较。
