diff --git a/_delphi_utils_python/delphi_utils/nancodes.py b/_delphi_utils_python/delphi_utils/nancodes.py
index e9e5a915a..985b8fa99 100644
--- a/_delphi_utils_python/delphi_utils/nancodes.py
+++ b/_delphi_utils_python/delphi_utils/nancodes.py
@@ -8,6 +8,6 @@ class Nans(IntEnum):
     NOT_MISSING = 0
     NOT_APPLICABLE = 1
     REGION_EXCEPTION = 2
-    PRIVACY = 3
+    CENSORED = 3
     DELETED = 4
-    UNKNOWN = 5
+    OTHER = 5
diff --git a/ansible/templates/sir_complainsalot-params-prod.json.j2 b/ansible/templates/sir_complainsalot-params-prod.json.j2
index 8a0553638..5a0302159 100644
--- a/ansible/templates/sir_complainsalot-params-prod.json.j2
+++ b/ansible/templates/sir_complainsalot-params-prod.json.j2
@@ -16,7 +16,7 @@
       "maintainers": ["U01AP8GSWG3","U01069KCRS7"]
     },
     "google-symptoms": {
-      "max_age": 11,
+      "max_age": 6,
       "maintainers": ["U01AP8GSWG3","U01069KCRS7"]
     },
     "usa-facts": {
diff --git a/facebook/contingency-combine.R b/facebook/contingency-combine.R
new file mode 100644
index 000000000..d4b730497
--- /dev/null
+++ b/facebook/contingency-combine.R
@@ -0,0 +1,199 @@
+#!/usr/bin/env Rscript
+
+## Combine and compress contingency tables by grouping variable set.
+##
+## Usage:
+##
+## Rscript contingency-combine.R path/to/individual/files/ path/to/rollup/files/
+##
+## Combines a set of contingency tables with a rollup CSV that contains all
+## dates for a given set of grouping variables. Can also be used to combine a
+## directory of tables spanning multiple time periods.
+
+suppressPackageStartupMessages({
+  library(dplyr)
+  library(readr)
+  library(purrr)
+  library(delphiFacebook)
+})
+
+
+#' Fetch all tables in a chosen directory. Combine and save according to grouping.
+#'
+#' @param input_dir Directory in which to look for survey CSV files, relative to
+#'   the current working directory.
+#' @param output_dir Directory in which to look for existing rollup files or
+#'   create new ones, relative to the current working directory.
+#' @param pattern Regular expression indicating which files in that directory to
+#'   open. By default, selects all `.csv` files with standard table date prefix.
+run_rollup <- function(input_dir, output_dir, pattern = "^[0-9]{8}_[0-9]{8}.*[.]csv$") {
+  if (!dir.exists(output_dir)) { dir.create(output_dir) }
+  
+  files <- list.files(input_dir, pattern = pattern)
+  if (length(files) == 0) { stop("No matching data files.") }
+
+  # Get df of input files and corresponding output files. Reformat as a list
+  # such that input files with same grouping variables (and thus same output
+  # file) are in a character vector named with the output file.
+  files <- map_dfr(files, get_file_properties)
+  files <- lapply(split(files, files$rollup_name), function(x) {x$filename})
+
+  seen_file <- file.path(output_dir, "seen.txt")
+  if ( any(file.exists(names(files))) ) {
+    assert(file.exists(seen_file),
+           paste0("If any output file exists, ", seen_file, ", listing input ",
+                  "files previously used in generating a combined table, should also exist"))
+  }
+  
+  for (output_name in names(files)) {
+    combined_output <- combine_tables(
+      seen_file, 
+      input_dir, 
+      files[[output_name]], 
+      file.path(output_dir, output_name))
+    write_rollup(
+      combined_output[["newly_seen_files"]],
+      seen_file,
+      combined_output[["output_df"]],
+      file.path(output_dir, output_name))
+  }
+  
+  return(NULL)
+}
+
+## Helper function to extract info from each file's filename.
+get_file_properties <- function(filename) {
+  short <- strsplit(filename, ".", fixed = TRUE)[[1]][1]
+  parts <- strsplit(short, "_", fixed = TRUE)[[1]]
+  
+  group <- parts[3:length(parts)]
+  # Specify compression format via name, to be parsed by `write_csv` later.
+  partial_name <- paste0(paste0(group, collapse="_"), ".csv.gz")
+
+  return(data.frame(
+    filename=filename,
+    rollup_name=partial_name))
+}
+
+## Helper function to load "seen" file.
+load_seen_file <- function(seen_file) {
+  if (!file.exists(seen_file)) {
+    file.create(seen_file)
+  }
+  
+  seen_files <- readLines(seen_file)
+  return(seen_files)
+}
+
+#' Combine data from set of input files with existing output data.
+#'
+#' @param seen_file Path to file listing filenames that have been previously
+#'   loaded into an output file.
+#' @param input_dir Directory in which to look for survey CSV files, relative to
+#'   the current working directory.
+#' @param input_files Vector of paths to input files that share a set of
+#'   grouping variables.
+#' @param output_file Path to corresponding output file.
+#' 
+#' @return Named list of combined output dataframe and character vector.
+combine_tables <- function(seen_file, input_dir, input_files, output_file) {
+  cols <- cols(
+    .default = col_guess(),
+    survey_geo = col_character(),
+    period_type = col_character(),
+    geo_type = col_character(),
+    aggregation_type = col_character(),
+    country = col_character(),
+    ISO_3 = col_character(),
+    GID_0 = col_character(),
+    region = col_character(),
+    GID_1 = col_character(),
+    state = col_character(),
+    state_fips = col_character(),
+    county = col_character(),
+    county_fips = col_character()
+  )
+  
+  # Get input data.
+  input_df <- map_dfr(
+    file.path(input_dir, input_files),
+    function(f) {
+      read_csv(f, col_types = cols)
+    })
+  
+  seen_files <- load_seen_file(seen_file)
+  if (any(input_files %in% seen_files)) {
+    assert(file.exists(output_file),
+           paste0("The output file ", output_file, " does not exist, but non-zero",
+                  " files using the same grouping variables have been seen before."))
+  }
+  
+  cols <- cols_condense(spec(input_df))
+  if ( file.exists(output_file) ) {
+    output_df <- read_csv(output_file, col_types = cols)
+  } else {
+    output_df <- input_df[FALSE,]
+  }
+  
+  # Use all columns up to the first non-aggregate column to find unique rows.
+  group_names <- names(output_df)
+  report_names <- c("val", "se", "sample_size", "represented", "effective_sample_size")
+  exclude_patterns <- paste0("^", report_names)
+  exclude_map <- grepl(paste(exclude_patterns, collapse="|"), group_names)
+  assert( any(exclude_map) ,
+          "No value-reporting columns are available or their names have changed.")
+  
+  ind_first_report_col <- min(which(exclude_map))
+  group_names <- group_names[ 1:ind_first_report_col-1 ]
+  
+  ## Deduplicate, keeping newest version by issue date of each unique row.
+  # Merge the new data with the existing data, taking the last issue date for
+  # any given grouping/geo level/date combo. This prevents duplication in case
+  # of reissues. Note that the order matters: since arrange() uses order(),
+  # which is a stable sort, ties will result in the input data being used in
+  # preference over the existing rollup data.
+  output_df <- bind_rows(output_df, input_df) %>%
+    relocate(issue_date, .after=last_col()) %>% 
+    arrange(issue_date) %>% 
+    group_by(across(all_of(group_names))) %>% 
+    slice_tail() %>% 
+    ungroup() %>% 
+    arrange(period_start)
+  
+  newly_seen <- setdiff(input_files, seen_files)
+  
+  return(list(
+    output_df=output_df,
+    newly_seen_files=newly_seen))
+}
+
+#' Save a combined dataframe and list of seen files to disk.
+#'
+#' @param newly_seen_files Character vector.
+#' @param seen_file Path to file listing filenames that have been previously
+#'   loaded into an output file.
+#' @param output_df Output dataframe.
+#' @param output_file Path to corresponding output file.
+write_rollup <- function(newly_seen_files, seen_file, output_df, output_file) {
+  # Automatically uses gzip compression based on output file name. Overwrites
+  # existing file of the same name.
+  write_csv(output_df, output_file)
+  
+  if (length(newly_seen_files) > 0) {
+    write(newly_seen_files, seen_file, append=TRUE)
+  }
+  
+  return(NULL)
+}
+
+
+args <- commandArgs(TRUE)
+
+if (length(args) < 2) {
+  stop("Usage: Rscript contingency-combine.R path/to/individual/files/ path/to/rollup/files/")
+}
+
+input_path <- args[1]
+output_path <- args[2]
+
+invisible(run_rollup(input_path, output_path))
diff --git a/facebook/delphiFacebook/R/contingency_aggregate.R b/facebook/delphiFacebook/R/contingency_aggregate.R
index 946a40a37..d73c4efc2 100644
--- a/facebook/delphiFacebook/R/contingency_aggregate.R
+++ b/facebook/delphiFacebook/R/contingency_aggregate.R
@@ -75,6 +75,8 @@ produce_aggregates <- function(df, aggregations, cw_list, params) {
 
     ## To display other response columns ("val", "sample_size", "se",
     ## "effective_sample_size", "represented"), add here.
+    # If these names change (e.g. `sample_size` to `n`), update
+    # `contingency-combine.R`.
     keep_vars <- c("val", "se", "sample_size", "represented")
 
     for (agg_id in names(dfs_out)) {
diff --git a/facebook/delphiFacebook/R/contingency_write.R b/facebook/delphiFacebook/R/contingency_write.R
index d9ed2e0ce..1acfd6be2 100644
--- a/facebook/delphiFacebook/R/contingency_write.R
+++ b/facebook/delphiFacebook/R/contingency_write.R
@@ -1,7 +1,8 @@
 #' Write csv file for sharing with researchers.
 #'
 #' CSV name includes date specifying start of time period aggregated, geo level,
-#' and grouping variables.
+#' and grouping variables. These columns are always inserted first in a table,
+#' with reported values (value, standard error, sample size, etc) following.
 #'
 #' @param data           a data frame to save; must contain the columns in
 #'                       `groupby_vars`.
diff --git a/facebook/delphiFacebook/man/write_contingency_tables.Rd b/facebook/delphiFacebook/man/write_contingency_tables.Rd
index b31c98e1a..ce687becd 100644
--- a/facebook/delphiFacebook/man/write_contingency_tables.Rd
+++ b/facebook/delphiFacebook/man/write_contingency_tables.Rd
@@ -24,5 +24,6 @@ calculate aggregations; used for naming the output file}
 }
 \description{
 CSV name includes date specifying start of time period aggregated, geo level,
-and grouping variables.
+and grouping variables. These columns are always inserted first in a table,
+with reported values (value, standard error, sample size, etc) following.
 }
diff --git a/sir_complainsalot/delphi_sir_complainsalot/check_source.py b/sir_complainsalot/delphi_sir_complainsalot/check_source.py
index 153af24b0..a2bd28c11 100644
--- a/sir_complainsalot/delphi_sir_complainsalot/check_source.py
+++ b/sir_complainsalot/delphi_sir_complainsalot/check_source.py
@@ -66,7 +66,7 @@ def check_source(data_source, meta, params, grace, logger):
             continue
 
         logger.info("Retrieving signal",
-            source=data_source,
+            data_source=data_source,
             signal=row["signal"],
             start_day=(datetime.now() - timedelta(days = 14)).strftime("%Y-%m-%d"),
             end_day=datetime.now().strftime("%Y-%m-%d"),
diff --git a/sir_complainsalot/params.json.template b/sir_complainsalot/params.json.template
index 49408b486..916d48f5b 100644
--- a/sir_complainsalot/params.json.template
+++ b/sir_complainsalot/params.json.template
@@ -17,7 +17,7 @@
       "maintainers": ["U01AP8GSWG3","U01069KCRS7"]
     },
     "google-symptoms": {
-      "max_age": 11,
+      "max_age": 6,
       "maintainers": ["U01AP8GSWG3","U01069KCRS7"]
     },
     "usa-facts": {