Impact of omalizumab therapy on the course of COVID-19 in a patient with severe asthma: A case report

Various risk factors have been attributed to coronavirus disease 19 (COVID-19) severity. Omalizumab as an immunoglobulin E blocker that enhances anti-viral immunity might be a potential cytokine storm trigger.Our goal was to investigate if the treatment with omalizumab due to severe asthma is a risk factor of severe COVID-19 pneumonia and if severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) can trigger asthma exacerbation.We report the case of a 65-year-old patient with severe allergic asthma receiving treatment with omalizumab for last 8 months with good results, who in December 2020 was infected with SARS-CoV-2. The patient was not vaccinated against COVID-19 (no vaccine was available at that time), and had comorbidities.COVID-19 course of presented patient was asymptomatic and resolved quickly without the need for hospitalization or asthma exacerbation. There was a slightly worse score on the asthma control questionnaire after COVID-19 resolution (2.1 point vs. 1.5 points) and a threefold increase in eosinophil counts (660 cell/µL vs. 230 cell/µL). However, no wheezing or deterioration in pulmonary function tests were found. A computed tomography of the chest revealed only minor densities of pulmonary parenchyma and thickened walls of bronchi.Omalizumab used in the treatment of severe allergic asthma proved to be safe and beneficial for the course of COVID-19 in the case reported. Simultaneously, SARS-CoV-2 was not a factor for asthma exacerbation.