When fdr said there was nothing to fear but fear itself, what bad result of
fear did he have in mind?

The bad result of fear Franklin D. Roosevelt had in mind was in the context of the great depression.

Explanation:

The quote was from Franklin D. Roosevelt's in 1933.The context is the great depression.

Roosevelt was cautioning  against the kind of fear that demoralizes the population and stops individuals from making positive moves to free themselves from a bad situation.

What he was saying is: give a friend a job,go to a movie, buy some ice cream,  go out and spend some money,help your neighbor. Don't let fear stop you to cringe in the corner nor doing anything; this will not help you or the economy.

porter is writing economic history because he is focusing on the cost of developing vaccines.

im not sure on this one