No, it is relevant because "a cause and effect relationship has been established between the dietary intake of vitamin D and contribution to the normal function

No, it is relevant because "a cause and effect relationship has been established between the dietary intake of vitamin D and contribution to the normal function of the immune system" & "The (EFSA) Panel considers that the role of vitamin D in the functioning of the immune system applies to all ages, including children." European Food Safety Authority: https://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/j.efsa.2015.4096 https://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/j.efsa.... Worth noting that in general and very roughly, at least 85% on average, of old people survive infection with Covid-19 a group which includes those in their 90s.