Vitamin D status and seroconversion for COVID-19 in UK healthcare workers.
Aduragbemi A FaniyiSebastian T LuggSian E FaustiniCraig WebsterJoanne E DuffyMartin HewisonAdrian M ShieldsPeter NightingaleAlex G RichterDavid R ThickettPublished in: The European respiratory journal (2021)