def METHOD_NAME(upload: bool) -> None:
    # Create a new snapshot.
    snap = Snapshot(f"who/{SNAPSHOT_VERSION}/mortality_database.csv")
    # Ensure destination folder exists.
    snap.path.parent.mkdir(exist_ok=True, parents=True)
    df = combine_datasets()
    add_snapshot("who/2023-08-01/mortality_database.csv", dataframe=df, upload=upload)
    # Add file to DVC and upload to S3.
    snap.dvc_add(upload=upload)