Asthma May Not be a Potential Risk Factor for Severe COVID-19 Illness: A Scoping Review

The coronavirus disease 2019 (COVID-19) is a respiratory disease caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), but whether the asthmatic patients are at increased risk for severe COVID-19 illness than non-asthmatic patients has remained unclear. This scoping review aimed to assess the available evidence to determine if asthmatic patients are at a higher risk for severe COVID-19 illness. Searching several electronic databases and adhering to the PRISMA guidelines, we conducted a scoping review of 70 articles and using defined inclusion-exclusion criteria, 21 articles were analyzed in-depth and included in this scoping review. The findings of this scoping review point to a lack of relationship between asthma and severe COVID-19 illness. While a limited number of studies (n = 4) identified asthma as a risk factor, most studies (n = 17) found no independent association between asthma and severe COVID-19 illness. We, thus, conclude that asthma may not be a potential risk factor for severe COVID-19 illness. Owing to limited evidence, we recommend large-scale prospective cohort studies with standardized methodologies to decipher potential role of asthma in COVID-19 severity. Further, understanding the impact of specific asthma medications, genetic factors, and other comorbidities on COVID-19 outcomes may help inform clinical practice guidelines for effective patient health management.