The WHO has certainly NOT conducted any field experiments regarding the matter in the context of Sri Lanka. If Sri Lanka had followed Bangladesh in proportion to the population, there should have been 182,000 deaths in Sri Lanka and not just 61. He has written to The Island Newspaper (17-11-20) asking the public to take “Vitamin D to increase immunity to COVID-19”. But NO randomized trials, or even authenticated (even if limited) clinical trials exit, to show that Vitamin D “Vitamin D to increase immunity to COVID-19”. Or is he claiming that Vitamin D has a specifically powerful ability to prevent Covid-19 but not Dengue etc?

Source: The Nation November 19, 2020 23:48 UTC