patients• age = 18 years• one of the following malignant diagnoses:- myeloid disorders (AML, MPN, or MDS)- lymphatic disorders (CLL, lymphoma, or MM)- malignant diseases treated with checkpoint inhibitorshealthy subjects• age = 18 Jahre• willingness to or present appointment for covid-19 vaccination

patients• age = 18 years• one of the following malignant diagnoses:- myeloid disorders (AML, MPN, or MDS)- lymphatic disorders (CLL, lymphoma, or MM)- malignant diseases treated with checkpoint inhibitorshealthy subjects• age = 18 Jahre• willingness to or present appointment for covid-19 vaccination