I'd go. I'm sure Disney asked some workers to stay home out of an abundance of caution. The US has a 1.9 per million population infection rate so your chances of randomly catching the virus are infinitesimal. The death rates are skewed due to where the virus has it, i.e. the nursing home in Seattle. If you are in otherwise good health and practice good hygiene you should be fine. I'm leaving for Tampa in a couple of weeks. Unless Southwest shuts down, I'm going.
I stand corrected. The CDC now is stating that this virus can be spread through droplets via sneeze or cough. This is contrary to what I had read earlier. I still would not change my plans.