Coronavirus: Prior treatment with cancer drug likely renders COVID-19 vaccine ineffective, study finds | News Center | Stanford Medicine

Rituximab, a drug widely used in patients with lymphoma, blunts or eliminates the antibody response to COVID-19 vaccines if it is administered before them, Stanford researchers say.
— Read on med.stanford.edu/news/all-news/2022/02/rituximab-treatment-covid-19-mrna-vaccines.html