Final answer:
The main concern of the plaintiff is that the patent limits the sharing of important scientific knowledge.
Step-by-step explanation:
The main concern of the plaintiff in the passage is the patent limits the sharing of important scientific knowledge. The plaintiff is worried about gene patents impeding scientific progress, favoring commercial interests, and restricting access to medical testing and treatment. The passage discusses how gene patents can drive up costs, reward secrecy, and prevent the sharing of important genetic information. This raises ethical and social issues as it limits the ability to fully utilize genomic data for healthcare purposes while protecting individual rights.