Effect of a test-and-treat approach to vitamin D supplementation on risk of all cause acute respiratory tract infection and covid-19: phase 3 randomised controlled trial (CORONAVIT).
David A JolliffeHayley HoltMatthew GreenigMohammad TalaeiNatalia PerdekPaul E PfefferGiulia VivaldiSheena MaltbyJane SymonsNicola L BarlowAlexa NormandaleRajvinder GarchaAlex G RichterSian E FaustiniChristopher OrtonDavid FordRonan A LyonsGwyneth A DaviesFrank KeeChristopher J GriffithsJohn NorrieAziz SheikhSeif O ShaheenClare ReltonAdrian R MartineauPublished in: BMJ (Clinical research ed.) (2022)
ClinicalTrials.gov NCT04579640.