Excel index and match with multiple conditions with multiple results - arrays

Question

I am trying to perform an index and match formula in Excel with a two large datasets which will return multiple unique results.
I have illustrated a simplified version of the data below. The two match conditions are A1 in table 2 = A:A in Table 1 and B2 in table 2 = B:B in table 1. This will result in multiple results and I want a formula I can drag from cells C3 across to D4 in table 2 to show the results of this index and match.
Table 1
First Name
Second Name
Food allergy code
Bob
Johnson
03
Bob
Johnson
04
Table 2
First Name
Second Name
Food allergy code 1
Food allergy code 2
Bob
Johnson
03
04
I have used the formula below which returns the first match, but when I drag this from cell C2 to D2 it returns the same value. I'm not sure how to rewrite this formula so that it provides each unique Food allergy code given both match conditions are met.
=TRANSPOSE(INDEX(Table1!C:C,MATCH(1,(Table1!A:A=A2)*(Table1!B:B=B2),0)))
Any help would be appreciated.

Answer 1

You could use the following, but it is computationally rather inefficient, so if you want to drag this formula over many cells, you should leave a comment to find a computationally more efficient solution.
=TRANSPOSE(FILTER(D:D,(B:B=G4)*(C:C=H4)))
which looks like this in an example: