COVID-19 in patients with acute leukemia: 3 years' experience of pandemic

Patients with acute leukemia are one of the most vulnerable risk groups for infection with SARS-CoV-2 and severe course of coronavirus infection. During the first 2 years of the pandemic, the mortality rate of patients with acute leukemia was 11-48 %, depending on leukemia type, and only reached population levels in 2022. Risk factors for severe COVID-19 in patients with acute leukemia are old age, concomitant cardiac pathology, metabolic syndrome, and the absence of acute leukemia remission. Chemotherapy administered one month before hospitalization with COVID-19 diagnosis showed statistical significance in influencing hospital mortality only in the group of patients with acute myeloid leukemia. Despite this, the international medical community has recommended delaying the start of chemotherapy until clinical symptoms of coronavirus infection have completely resolved and a negative test result for SARS-CoV-2 has been obtained for all types of leukemia. Currently, the most optimal tactic is to prevent SARS-CoV-2 infection by vaccinating patients with acute leukemia receiving antitumor treatment. If the immunological response to vaccination is insufficient, it is possible to use virus-neutralizing monoclonal antibodies as a safe and effective method of primary prevention of COVID-19.

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