MedPage Today (7/17, Bassett) reports, “COVID-19 booster shots appeared to protect against severe disease among patients with cancer, according to a large retrospective cohort study.” Investigators found that “with a monovalent booster, the vaccine effectiveness to prevent COVID hospitalization was 29.2%, and 29.9% with a bivalent booster, while the number needed to vaccinate in order to prevent one hospitalization was 166 and 451, respectively.” MedPage Today add, “These findings are of importance, given that a second study...showed that certain factors, including hematologic cancers and lung cancer, as well as use of chemotherapy, were associated with COVID severity.” Both studies were published in JAMA Oncology.