Inclusion Criteria:  Age 16-75 years Diagnosis of acute leukaemia, lymphoma or myeloma by consultant haematologist or multidisciplinary meeting discussion Undergoing treatment with either induction chemotherapy, autologous stem cell transplant, allogeneic stem cell transplant, or chimeric antigen receptor (CAR) T-cell therapy as part of their normal care.  Exclusion Criteria:  Medical condition that would result in discomfort from the application of chest or axillary monitoring. Allergy to a component of the monitoring devices Diminished capacity or any circumstance that would prohibit them from understanding and providing informed consent in accordance with ICH-GCP (International Conference on Harmonisation, Good Clinical Practice) principles.