Filter results by incident date

[ghost]

User Story As a user, I want the option to filter reaction results by date the incident occurred so that I can narrow the scope of my results.

[ghost]

Acceptance Criteria

• By default, results are based on all US incidents reported to the FDA
• User can apply a date range filter to incidents reported to the FDA
• Reactions returned are automatically updated based on user-selected date range

[ghost]

Priority level updated to Low from Medium.