Dwayne Turner of Bay St. Louis wasn’t feeling well at his job as a chemical lab technician on Saturday, tested positive for COVID, and on Monday morning he sat hooked up to an IV at Memorial Hospital’s recently expanded monoclonal antibody infusion center in a former gym. The 37-year-old hoped he’d soon be rid of his lower back pain and muscle aches from the virus. He was not vaccinated but felt comfortable getting the infusion — another experimental treatment that has left Memorial with a 2% rate of hospitalization after use — because his friends and family recovered so quickly after they received it.