Is Vitamin A rich diet important to fight Covid-19?

There are a number of reviews of the role of vitamin A in enhancing the immunity and in improving an individual’s susceptibility to infection.

Vitamin A is important for normal differentiation of epithelial tissue and for immune cell maturation and function. Thus, vitamin A deficiency is associated with impaired barrier function, altered immune responses and increased susceptibility to a range of infections. 

Lack of vitamin A leads to respiratory infections, diarrhoea and severe measles. Studies show children with  no deficiency of vitamin A  reduced all-cause mortality, reduced incidence, morbidity and mortality from measles and from infant diarrhoea, and improved symptoms in acute pneumonia which is a symptom seen in patients with Covid-19.