diff --git a/denv_pipeline/scripts/denv_pipeline.smk b/denv_pipeline/scripts/denv_pipeline.smk
index b5396fc..d9e8dd7 100644
--- a/denv_pipeline/scripts/denv_pipeline.smk
+++ b/denv_pipeline/scripts/denv_pipeline.smk
@@ -79,17 +79,20 @@ rule make_qc_plots:
     params:
         results_dir = rules.summary.params.results_dir
     run:
-        serotype_dict, colour_dict, patch_list = visualisations.prepare_for_plots(input.serotype_calls_file)
-        
-        visualisations.variant_plot(params.results_dir, input.variant_summary_file, serotype_dict, colour_dict, patch_list)
-        if config["download"]:
-            source = os.path.join(params.results_dir, "variant_plot.pdf")
-            dest = os.path.join(config["outdir"], "downloads")
-            shell("cp -r {source} {dest}")
-
-        if config["ct_file"] and config["ct_column"] and config["id_column"]:
-            visualisations.ct_plot(params.results_dir, config["ct_file"], config["ct_column"], config["id_column"], input.serotype_calls_file, serotype_dict, colour_dict, patch_list)
+        result = visualisations.prepare_for_plots(input.serotype_calls_file)
+        if result:
+            serotype_dict, colour_dict, patch_list = result
+            visualisations.variant_plot(params.results_dir, input.variant_summary_file, serotype_dict, colour_dict, patch_list)
             if config["download"]:
-                source = os.path.join(params.results_dir, "ct_plot.pdf")
+                source = os.path.join(params.results_dir, "variant_plot.pdf")
                 dest = os.path.join(config["outdir"], "downloads")
                 shell("cp -r {source} {dest}")
+
+            if config["ct_file"] and config["ct_column"] and config["id_column"]:
+                visualisations.ct_plot(params.results_dir, config["ct_file"], config["ct_column"], config["id_column"], input.serotype_calls_file, serotype_dict, colour_dict, patch_list)
+                if config["download"]:
+                    source = os.path.join(params.results_dir, "ct_plot.pdf")
+                    dest = os.path.join(config["outdir"], "downloads")
+                    shell("cp -r {source} {dest}")
+        else:
+            shell("touch {output.variant_plot}")
diff --git a/denv_pipeline/scripts/make_summary_files.py b/denv_pipeline/scripts/make_summary_files.py
index 5382404..1c50a0f 100644
--- a/denv_pipeline/scripts/make_summary_files.py
+++ b/denv_pipeline/scripts/make_summary_files.py
@@ -17,9 +17,7 @@ def summarise_files(config, per_sample_files, serotype_call_file, top_call_file,
         with open(file) as f:
             data = csv.DictReader(f, delimiter="\t")
             for l in data:
-                if not l['serotype_called'] in all_coverage[l['sample_id']]:
-                    all_coverage[l['sample_id']][l['serotype_called']] = []
-                all_coverage[l['sample_id']][l['serotype_called']].append(l['coverage_untrimmed'])
+                all_coverage[l['sample_id']][l['reference_sequence_name']] = float(l['coverage_untrimmed'])
 
                 possible_tops.append(l)
                 all_lines.append(l)
@@ -202,22 +200,31 @@ def pull_low_coverage_seqs(config, all_coverage, high_coverage):
         if name not in high_coverage:
             lst = []
             for sero, cov in cov_dict.items():
-                if "sylvatic" not in sero:
-                    lst.append(cov)
+                lst.append(cov)
 
             in_order = sorted(lst, reverse=True)
-            if len(in_order) > 1:
+            if len(in_order) > 1: #I'm not sure when it would ever be less than 6, but leaving for now just in case
                 if in_order[0] > (in_order[1] + 5):
                     top = [i for i in cov_dict if cov_dict[i]==in_order[0]][0]
                 else:
-                    top = "NA"
+                    first = [i for i in cov_dict if cov_dict[i]==in_order[0]][0]
+                    second = [i for i in cov_dict if cov_dict[i]==in_order[1]][0]
+                    
+                    if second == f"{first}_sylvatic" or first == f"{second}_sylvatic":
+                        if in_order[0] > (in_order[2] + 5):
+                            top = [i for i in cov_dict if cov_dict[i]==in_order[0]][0]
+                        else:
+                            top = "NA"
+                    else:
+                        top = "NA"
+            
             elif len(in_order) == 1:
                 top = in_order[0]
             else:
                 top = "NA"
 
             top_call[name] = top
-        
+
         low_cov_seqs = set()
         depth = config["depth"]
         with open(os.path.join(config["outdir"], "results", "low_coverage_calls.csv"), 'w') as fw:
diff --git a/denv_pipeline/scripts/visualisations.py b/denv_pipeline/scripts/visualisations.py
index 498fb5a..4090cad 100644
--- a/denv_pipeline/scripts/visualisations.py
+++ b/denv_pipeline/scripts/visualisations.py
@@ -22,15 +22,18 @@ def prepare_for_plots(final_serotype_calls):
     colour_dict = {}
     custom_cmap = mpl.colors.LinearSegmentedColormap.from_list("", ["#567CBE","#D58A80", "#ADB3D9"], len(all_viruses))
 
-    lst = custom_cmap(range(len(all_viruses)))
-    for i,j in enumerate(all_viruses):
-        colour_dict[j] = rgb2hex(lst[i])
-
-    patch_list = []
-    for serotype,hexc in colour_dict.items():
-        patch_list.append(mpatches.Patch(color=hexc, label=serotype))
- 
-    return virus_dict, colour_dict, patch_list
+    if len(all_viruses) == 0:
+        return
+    else:
+        lst = custom_cmap(range(len(all_viruses)))
+        for i,j in enumerate(all_viruses):
+            colour_dict[j] = rgb2hex(lst[i])
+
+        patch_list = []
+        for serotype,hexc in colour_dict.items():
+            patch_list.append(mpatches.Patch(color=hexc, label=serotype))
+    
+        return virus_dict, colour_dict, patch_list
 
 def variant_plot(results_dir, variants_summary_file, virus_dict, colour_dict, patch_list):