Methods
A systematic search was carried out in 4 electronic databases: EMBASE,
MEDLINE, MedRxiv, and Scopus to assess the relationship between asthma
and COVID-10 using studies in English language available up to 2020 May
14th. The search terms included were “COVID-19” OR
“SARS-CoV-2“ OR “Coronavirus“ AND “Asthma” OR “Allergy” OR
“Case series” OR “Comorbidities” OR “Epidemiology” OR
“Hospitalization” OR “Risk factors”. Additionally, the references of
the initial included studies were hand-searched to identify other
possibly eligible studies.