This is a well-written meta analysis in a top-tier medical journal which demonstrates a convincing relationship between acute respiratory infection, Vit D basel

This is a well-written meta analysis in a top-tier medical journal which demonstrates a convincing relationship between acute respiratory infection, Vit D baseline levels, and supplementation. However, their conclusion that the findings warrant public health interventions and widespread supplementation is arguable. There are real risks and costs to over-supplementation, and the absolute risk reduction they demonstrate (from 42% to 40%) is not large.