Physical Danger
Medical writing may be one of the least dangerous jobs out there, especially in the field of science. These professionals stay nice and safe in their offices, sitting on comfy chairs and enjoying the whoosh of central air conditioning.
You will have your quibbles, however. Paper cuts are an occupational hazard for paper pushers, like medical writers who field lots and lots of paper. Stock up on Neosporin and band-aids. On a more serious note, watch out for carpal tunnel syndrome, from all that typing, or maybe a sore neck from staying in one (hunched-over) posture too long.
But who are we kidding? You're not exactly going to have to show up to work wearing a helmet (we really don't recommend this; you don't want to end up being described behind your back around the water cooler as "the Helmet Creep").