Introduction: Sunlight exposure increases vitamin D-related immune modulation and motility of T lymphocytes. Blue light exposure from the sun can stimulate immune function and help promote healthy circadian rhythm. Hence, greater sunlight exposure may lower the risk of Hodgkin lymphoma and non-Hodgkin lymphoma (NHL). Altitude may also lower the risk of these cancers through an oxygen-related mechanism, and because cosmic radiation has less shield from the atmosphere at higher levels, it allows for radiation hormesis.

中文翻译：

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较高的阳光照射和更高的海拔高度可降低淋巴瘤风险的生态学证据。

简介：暴露于阳光下会增加与维生素D相关的免疫调节和T淋巴细胞的活力。暴露在阳光下的蓝光可以刺激免疫功能，并有助于促进健康的昼夜节律。因此，更多的阳光照射可以降低霍奇金淋巴瘤和非霍奇金淋巴瘤（NHL）的风险。海拔高度还可能通过与氧气有关的机制降低罹患这些癌症的风险，并且由于宇宙辐射在较高水平下对大气的屏蔽性较小，因此可以实现辐射兴奋。