Should you get your COVID and flu shots together? new study aims to find out for immunocompromised patients

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- All participants must meet ALL the following inclusion criteria: i. Adults (≥18 years) ii. Received the primary mRNA COVID-19 vaccine series (i.e., ≥3 doses) iii. Have at least one of the following immunocompromising conditions: a) Received a solid organ transplant (SOT) ≥3-months ago, and treated with a conventional maintenance immunosuppression regimen; b) People living with HIV (PLWH) receiving ART for ≥6 months who meet at least one of the following conditions: i) AIDS-defining illness in the last 6 months, ii) TB diagnosis in the last 6-months, iii) CD4\&lt;200 cells/µL in the last 6 months, iv) CD4%\&lt;15% in the last 6 months, or v) absence of HIV viral suppression in the last 6 months; c) Inflammatory bowel disease (IBD) treated with a conventional or biologic immunosuppressive agent for ≥3 months; d) Rheumatoid arthritis or systemic lupus erythematosus (herein referred to as rheumatological disease (RD)) treated with a conventional or biologic immunosuppressive agent for ≥3 months. Exclusion Criteria: * Potential participants who meet ANY of the following criteria will be excluded: i. Received any of the following: 1. Annual vaccination against influenza \&lt; 6 months ago 2. COVID-19 booster \&lt; 3 months ago ii. History of any of the following: <!-- --> 1. life-threatening reaction any component of the IIV or COVID-19 vaccines 2. Guillain-Barre syndrome or myocarditis within 6 weeks of a previous influenza or COVID-19 vaccination 3. Contraindication to intramuscular vaccines such as bleeding disorder, severe thrombocytopenia, etc; iii. Receiving intravenous immunoglobulins; iv. Have underlying primary inborn errors of immunity; v. Receiving chemotherapy such as cyclophosphamide \&lt; 6-months ago; vi. Unable to provide informed consent