Abstract Background Allergic diseases (ADs) such as asthma are presumed risk factors for
COVID-19 infection. However, recent observational studies suggest that the assumed …

Allergic diseases were recently reported related to both SARS-CoV-2 infection and severe
COVID-19 through observational studies. However, their causal relationship remains …

Objectives Recent studies suggest that asthma may have a protective effect on COVID-19.
We aimed to investigate the causality between asthma and two COVID-19 outcomes and …

Recent evidence suggests that allergic asthma (AA) decreases the risk of Coronavirus
Disease 2019 (COVID-19). However, the reasons remain unclear. Here, we systematically …

We carried out a bidirectional Mendelian randomization (MR) including cases of eczema
(N= 218,792), asthma (N= 462,933), and allergic rhinitis (N= 112,583). COVID-19 …

Background: Asthma is observationally associated with an increased risk of COVID-19, but
the causality remains unclear. We aim to determine whether there is a casual role of asthma …

Background The severity of COVID-19 is influenced by various factors including the
presence of respiratory diseases. Studies have indicated a potential relationship between …

To the Editor: In individuals with severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) infection, the severity of illness ranges from asymptomatic to fatal. 1 The Centers for …

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 …

Background Genetic factors contribute to individual differences in the severity of coronavirus
disease 2019 (COVID-19). A portion of genetic predisposition can be captured using …