Bill Hodge, an Auckland University law professor, said in his view any consumer or the parents of any baby who contracted botulism would be able to sue, even in New Zealand.
"The first thing we think of in New Zealand is ACC."
ACC generally prevents anyone suing based on it being an accident.
But Hodge said botulism was a disease, not an accident, and any infection could be seen as negligent, which could result in consumers or the parents bringing action.
He said overseas legal action would depend on the laws of that country but a previous contamination case in China showed it was not easy for people to take legal action.
"The children who died from melamine-laced Sanlu product would have a strong case for compensation - but I'm not sure that went very far."
In May 2010, Hong Kong's Small Claims Tribunal rejected a compensation bid by four mainland Chinese parents against a Fonterra company after their children were poisoned in the melamine milk powder scandal in 2008.