Continuous Temperature Monitoring (CTM) for Cytokine Release Syndrome (CRS), an Immune-Related Adverse Event

Background: Drugs or cell therapies to treat cancer can sometimes cause cytokine release syndrome (CRS). That is, the body makes too many cytokines after treatment. Cytokines are proteins that play a role in the immune system. CRS can cause fever, chills, fatigue, low blood pressure, or breathing problems. Researchers want to know if continuously monitoring a person s body temperature can help reduce the chance of getting serious CRS. Objective: To learn if an approved patch called TempTraq can detect fever before serious CRS develops. Eligibility: People aged 18 years and older with cancer who are staying at the NIH clinic for treatment with drugs or cell therapies. Design: Participants will receive TempTraq patches and a special NIH tablet. The TempTraq is a small patch applied to clean, dry skin under the arm. It continually monitors body temperature and sends the data to an application on the tablet. Participants will wear the patch most of the time they are admitted to the hospital. They could wear it for up to 15 days. The patch monitoring does not replace regular temperature checks, all participants will still have have their regular temperature checks as part of their treatment plan. Participants may also opt to use VitalTraq, another application on the tablet. They will hold the screen up to their face for about 1 minute. VitalTraq uses the camera in the tablet to measure blood pressure, heart rate, and breathing. They will do this once per day while they are in the clinic; they may do it more often if they have a fever or feel unwell. Blood may be drawn for research. Participants will be asked about their experience within 1 week after TempTraq is removed. Participants who choose to use the patch, complete its use, and return at a later date for another treatment or study, may be able to re-enroll to have the patch used again.

* INCLUSION CRITERIA: * Age \>= 18 years. * Participants must be enrolled in an active treatment protocol at NIH utilizing cellular therapy, cellular engagers, or other novel monotherapy or combination immunotherapy agents associated with a known or anticipated risk profile for grade \>= 3 cytokine release syndrome (CRS) adverse effects. * Participants must be receiving immunotherapy dose(s) and be admitted to the Clinical Center. Note: Enrollment during the first week of treatment on an active treatment protocol, when CRS risk is highest, is preferable, but starting later during their active treatment course is acceptable. * Ability of the participant to understand and the willingness to sign a written informed consent document. EXCLUSION CRITERIA: * Prior solid organ or stem cell transplantation on active immunosuppression. * Regimen including antibiotics, for documented active infection within 7 days prior to study enrollment. * Current syndrome associated with cyclic fevers. * History of severe drug allergies, including Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS). * Known current alcohol use disorder or drug use disorder that, in the opinion of the investigator, would interfere with the participant s ability to comply with study procedures or safely participate in the study.