Only if you restrict to viruses that haven't killed their host population ;) But even then you could just wait until another higher-intelligence species appears

Only if you restrict to viruses that haven't killed their host population ;) But even then you could just wait until another higher-intelligence species appears and give them the same pathogen. If everything survives, the resulting community can live with each other and that requires a sufficiently mild virus. However that doesn't help predict the future, because you can't enforce the precondition of everyone surviving.