Yeah I agree..it wont hurt, but it wont necessarily make or break how you do in your immuno courses in dschool. As was said, it maybe be easier or harder depending on how its taught at your school...I only took it in undergrad b/c I wanted to add another A to my sci. gpa from an upper level bio course. I regret not taking micro though..i hear that class can be tough (at least here)..and i've never taken it 😱