vitamin A
... that vitamin A deficiency is the leading cause of preventable childhood blindness despite existing prevention programs?
... that <b id="mwBZQ"><a href="./Vitamin_A" id="mwBZU" rel="mw:WikiLink" title="Vitamin A">vitamin<span id="mwBZY" typeof="mw:Entity"> </span>A</a></b> deficiency is the leading cause of preventable childhood blindness despite existing prevention programs?