That data currently exists, although I’m not sure how definitive it is. A study was conducted where infected monkeys were exposed, which triggered detectable antibodies, and then exposed again. The monkeys did not show signs of the virus upon secondary exposure. I believe the biggest open question is the longevity of those antibodies and whether or not the virus mutates rapidly enough to eventually make the antibodies ineffective. Information comes from this video: https://youtu.be/kgzFAdYwYLM