Before revision:  An implication of this preliminary observation is to suggest a potential route of investigation in the COVID-19 research field making use of an already-established literature on the interplay of local and systemic iron regulation,  respiratory infections and the hepcidin protein.
After revision:  An implication of this preliminary observation is to suggest a potential route of investigation in the COVID-19 research field making use of an already-established literature on the interplay of local and systemic iron regulation, cytokine-mediated inflammatory processes, respiratory infections and the hepcidin protein.