In a study of more than 6000 patients with hematologic cancers, 21% developed severe COVID-19, despite being vaccinated. Researchers reported these results in JAMA Network Open.
The study included 6122 patients from the national Veterans Health Administration who had hematologic cancers. All patients had been vaccinated against COVID-19 but had a confirmed case of COVID-19 between January 1, 2021, and September 30, 2022.
The patients had chronic lymphocytic leukemia (CLL; n=1206) or other non-Hodgkin lymphomas (NHLs; n=1731), plasmacytoid neoplasms (n=1014), myeloproliferative neoplasms (MPNs; n=1144), myelodysplastic syndromes (MDS; n=518), chronic myeloid leukemia (CML; n=180), acute myeloid leukemia (AML; n=172), or Hodgkin lymphoma (n=157).
A total of 1301 paints (21.3%) had severe COVID-19, which was defined as dying within 28 days of SARS-CoV-2 infection, requiring mechanical ventilation, or requiring hospitalization with the use of dexamethasone, evidence of hypoxemia, or the use of supplemental oxygen.
The proportion of patients with severe COVID-19 was similar among those with lymphoid malignancies (21.6%) and those with myeloid malignancies (20.5%). The rate of severe COVID-19 was highest in patient with MDS (28.2%) and lowest in patients with Hodgkin lymphoma (12.1%).