Chris mentioned it.
Here's a snippet:
Even if the antibodies are capable of this, the immunity they provide could wane over time.
"Because this is so new, it's hard to predict what's going to happen," said Joel Baines, a virologist at Louisiana State University. "There's going to be a period of immunity, and it could be as little as eight months to a year, and as long as several years."
http://www.nbcnews.com/health/health-news/can-you-catch-coronavirus-twice-you-ll-probably-be-immune-n1171976

DO SOMETHING!