A nurse is reviewing patients on the medical-surgical unit to identify those at highest risk for infection. Which patients should the nurse identify as having increased infection risk? (Select all that apply)

A 68-year-old with COPD who has a central venous catheter for antibiotic therapy

A 45-year-old who received a kidney transplant 2 months ago and takes immunosuppressive medications

A 28-year-old healthy adult recovering from an uncomplicated appendectomy on postoperative day 2

A 3-month-old infant born at 32 weeks gestation with low birth weight

A 72-year-old with diabetes mellitus and a chronic foot ulcer