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Allergy: European Journal of Allergy and Clinical Immunology ; 76(SUPPL 110):480, 2021.
Article in English | EMBASE | ID: covidwho-1570384

ABSTRACT

Background: During the ongoing pandemic of Coronavirus Disease 2019 (COVID-19) allergic patients need to continue their constant and proper treatment, including allergen-specific immunotherapy. These patients are expected to be at a higher risk for exacerbation of lung inflammation during viral infection. We investigated the putative interplay existing between allergen-specific immunotherapy and COVID-19 infection in Hymenoptera venom-allergic population. Method: We evaluated the frequency and severity of COVID-19 infection in a cohort of 211 Hymenoptera venom-allergic patients referring to our Center from the end of February till May 20th 2020 for the regular administration of venom immunotherapy (VIT). Each patient completed a form with information regarding symptoms (fever, cough, dyspnoea, sore throat, anosmia and/or ageusia) and eventual close COVID-19 contacts in the previous 14 days. Results: Our result showed that the median age of our cohort is similar to the one that in our region has been associated with a high incidence of COVID-19 infection, increased hospitalization and mortality rates. We reported only an isolated positivity of COVID-19 in the overall group, whereas none suffered from upper airway symptoms associated with COVID-19 (fever, cough, dyspnoea, sore throat, anosmia and/or ageusia). In our cohort 24 patients were in monotherapy with ACE-i, but none of these patients developed COVID-19 disease. In our cohort the median serum tryptase level at baseline was 8.13 ± 11.49: no correlations were found between tryptase levels and COVID-19 infection. Conclusion: Even though the demographic characteristics pose a substantial risk for such a population, we suggest that a regular administration of VIT may help to the development of an immunological milieu able to down modulate the Th1/Th17 environment that has been linked to inflammatory manifestations of COVID-19. To the best of our knowledge, this is the first description of the incidence of COVID-19 infection in Hymenoptera venom allergic patients treated with VIT, suggesting indirectly that venom immune tolerance-inducing treatment may be capable of reducing the aberrant inflammatory response induced by the virus in this specific population. (Table Presented).

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