Nope, poor logic in action, as the family of the one was not responsible for the 99 getting the disease in the first place. By your twisted reasoning, if you have enough extra money to feed a starving person, but choose to exercise your right to keep it, the starving person can seek vengence on you.
Er, no. The people who kept other people from getting a cure have directly harmed others by making a cure impossible to receive. Their action would have removed the cure from the market and doomed many others to death. If someone is starving and I won’t give them food they are free to go elsewhere. I won’t stop anyone else from giving away food.