read_flat_vidrl: Remove TODOs for verifying vaccine strain

tdb/vidrl_upload.py

@@ -432,11 +432,12 @@ def standardize_human_serum(record: dict, passage_field: str) -> dict:
         return record
 
     new_record = record.copy()
-    # TODO: Translate passage to egg/cell to support vaccine strain verification
+    # We are purposely _not_ verifying serum_strain/serum_passage against the VACCINE_MAPPING.
+    # VIDRL uses reference antigens that are proxies for the human serum
+    # vaccine strains so these do not always align with the exact egg/cell vaccine strains.
+    #   -Jover, 04 November 2024
     new_record["serum_passage"] = new_record[passage_field]
     human_serum_id = new_record["serum_abbr"]
-
-    # TODO: Verify the serum strain matches the year's vaccine strain
     new_record["serum_strain"] = re.sub(r"pool$", "", new_record["serum_strain"])
     _, new_record["serum_id"] = parse_human_serum_id(human_serum_id, HUMAN_SERA_YEAR_REGEX)
     return new_record