No, as a short answer. They would have to prove malicious intent and that would be impossible.
Just because Pharma Co. thinks they have the cure, there are hoops and hoops to jump through in order to get it on the market. The Government is the entity that is ultimately responsible for approving cures.
A company cannot be held liable for 'What they didn't do' and that is the premise to your question.
>>8026398 adding more plaintiffs to a case that can't happen doesn't strengthen it.
~lawfag jr