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This paper examines the potential link between COVID-19 and the presence of comorbidities and assesses the
role of inflammation in this correlation. In COVID-19 patients, the most frequently associated diseases share a pathogenic
inflammatory basis and apparently act as a risk factor in the onset of a more severe form of the disease, particularly in
adulthood. However, in children, the understanding of the underlying pathogenic mechanisms is often complicated by the
milder symptoms presented. A series of theories have therefore been put forward with a view of providing a better
understanding of the role played by inflammation in this dramatic setting. All evidence available to date on this topic is
discussed in this review.