Looks for each of the checkboxes by id. We can't use OR, so we have to use AND.  When I uncheck Condoms and STI, then it adds to the WHERE query: "Condoms = 0 AND STI = 0" so the only thing left is Pregnancy.

The examples we were working with at hack night used ```+ " AND "```.  I pushed each of these into an array, and then use join to connect 1, 2, 3, or any number of items with AND.