T-cell responses to SARS-CoV-2 have been described in recovered patients, and may be important for immunity following infection and vaccination as well as for the development of an adoptive immunotherapy for the treatment of immunocompromised individuals. In this report, we demonstrate that SARS-CoV-2-specific T-cells can be expanded from convalescent donors, and recognize immunodominant viral epitopes in conserved regions of membrane, spike, and nucleocapsid. Following in vitro expansion using a GMP-compliant methodology (designed to allow the rapid translation of this novel SARS-CoV-2 T-cell therapy to the clinic), membrane, spike, and nucleocapsid peptides elicited IFN-γ production, in 27 (59%), 12 (26%), and 10 (22%) convalescent donors (respectively), as well as in 2 of 15 unexposed controls. We identified multiple polyfunctional CD4-restricted T-cell epitopes within a highly conserved region of membrane protein, which induced polyfunctional T cell responses, which may be critical for the development of effective vaccine and T cell therapies. Hence, our study shows that SARS-CoV-2 directed T-cell immunotherapy targeting structural proteins, most importantly membrane protein, should be feasible for the prevention or early treatment of SARS-CoV-2 infection in immunocompromised patients with blood disorders or after bone marrow transplantation to achieve anti-viral control while mitigating uncontrolled inflammation.

An adolescent female patient presenting with subacute onset of dysphagia and hoarseness underwent a direct laryngoscopy, which revealed epiglottitis. After 2 hospitalizations and multiple consultations and biopsies, all infectious testing results for viral, bacterial, fungal, and acid-fast bacilli etiologies were negative. The patient's use of electronic cigarettes was the only exposure elicited with a likely role in her presentation. This case, combined with the growing body of evidence revealing the toxic effects of vaping and the increasing use of electronic cigarettes among adolescent patients, highlights the many unknowns and risks regarding the biological effects of this practice.

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