Is asthma an exclusionary condition for SARS-CoV-2 infection in China? –the relationship between asthma and COVID-19

Results The possible reasons for the very low COVID-19 infection in asthma patients in China may be as follows: the expression of ACE2 in asthma patients is relatively low; the use of ICS in asthma patients may have protective effect; data bias and ethnic differences are also possible reasons, too.