When you have multiple columns to check to get one status, check individual status first.
Excel file example:
Columns: B C D E F G H I
Row1: Test1 Test2 Test3 Test4 Status=Negative Status=Vaccinated Status=Positive Status=Infected
Row2: Negative Negative 1 4 Negative Fix Fix Fix
Row3: Negative Negative 0 3 Fix Vaccinated Fix Fix
Row4: Positive Positive 2 7 Fix Fix Positive Fix
Row5: Positive Positive 0 3 Fix Fix Fix Infected
Under column F
=IF(AND(B3="Negative",C3="Negative",D3>0,E3<=5), "Negative", "Fix")
Under column G
=IF(AND(B3="Negative",C3="Negative",D3=0,E3<=5), "Vaccinated", "Fix")
Under column H
=IF(AND(B3="Positive",C3="Positive",D3>0,E3>5), "Positive", "Fix")
Under column I
=IF(AND(B3="Positive",C3="Positive",D3=0,E3<=5), "Infected","Fix")
Explanation i.e. column F: If B3 is equal to "Negative", and C3="Negative", and D3 is greater than 0, and E3 is less than or equal to 5, put "Negative" under column F. If conditions doesn't match, put "Fix" under column F
Reference: https://www.ablebits.com/office-addins-blog/nested-if-excel-multiple-conditions/
Excel file example:
Columns: A B C D E F
Row1: Test1 Test2 Test3 Test4 Status Explanation
Row2: Negative Fix Fix Fix Negative Not infected
Row3: Fix Vaccinated Fix Fix Vaccinated Not infected + vaccinated
Row4: Fix Fix Positive Fix Positive Infected + sick
Row5: Fix Fix Fix Infected Infected Infected + not sick
FUNCTION to put into column E under "Status":
=IF(A1="Negative","Negative", IF(B1="Vaccinated", "Vaccinated", IF(C1="Positive","Positive", IF(D1="Infected","Infected"))))
Explanation: If A1 is equal to "Negative", put "Negative" in column E, or if B1="Vaccinated", put "Vaccinated" in column E etc. until all conditions have been tested.
FUNCTION to put into column F under "Explanation":
=IF(E1="Negative","Not infected", IF(E1="Vaccinated", "Not infected + vaccinated", IF(E1="Positive","Infected + sick", IF(E1="Infected","Infected + not sick"))))
Explanation: If E1 is equal to "Negative", put "Not infected" in column F, or if E1="Vaccinated", put "Not infected + vaccinated" in column F etc. until all conditions have been tested.