diff --git a/cara/apps/calculator/report_generator.py b/cara/apps/calculator/report_generator.py
index 7f225c06..2f73c05d 100644
--- a/cara/apps/calculator/report_generator.py
+++ b/cara/apps/calculator/report_generator.py
@@ -117,7 +117,7 @@ def plot(times, concentrations, model: models.ExposureModel):
     ax.spines['top'].set_visible(False)
 
     ax.set_xlabel('Time of day')
-    ax.set_ylabel('Mean concentration ($q/m^3$)')
+    ax.set_ylabel('Mean concentration ($virions/m^{3}$)')
     ax.set_title('Mean concentration of virions')
     ax.xaxis.set_major_formatter(matplotlib.dates.DateFormatter("%H:%M"))
 
@@ -238,7 +238,7 @@ def comparison_plot(scenarios: typing.Dict[str, dict], sample_times: np.ndarray)
     ax.xaxis.set_major_formatter(matplotlib.dates.DateFormatter("%H:%M"))
 
     ax.set_xlabel('Time of day')
-    ax.set_ylabel('Mean concentration ($q/m^3$)')
+    ax.set_ylabel('Mean concentration ($virions/m^{3}$)')
     ax.set_title('Mean concentration of virions')
 
     return fig
diff --git a/cara/apps/calculator/static/js/report.js b/cara/apps/calculator/static/js/report.js
index f7108525..d1f0d92f 100644
--- a/cara/apps/calculator/static/js/report.js
+++ b/cara/apps/calculator/static/js/report.js
@@ -30,7 +30,7 @@ function draw_concentration_plot(svg_id, times, concentrations, exposed_presence
         .attr('height', margins.top)
         .append('xhtml:body')
         .style('text-align', 'center')
-        .html('Mean concentration of infectious quanta');
+        .html('Mean concentration of virions');
 
     // Line representing the mean concentration.
     var lineFunc = d3.line()
@@ -74,7 +74,7 @@ function draw_concentration_plot(svg_id, times, concentrations, exposed_presence
         .attr('text-anchor', 'middle')
         .attr('x', (height + margins.bottom) / 2)
         .attr('y', (height + margins.left) * 0.92)
-        .text('Mean concentration (q/m^3)');
+        .text('Mean concentration (virions/m³)');
 
     // Area representing the presence of exposed person(s).
     exposed_presence_intervals.forEach(b => {
@@ -181,4 +181,4 @@ function draw_concentration_plot(svg_id, times, concentrations, exposed_presence
         focus.select('#tooltip-time').text('x = ' + time_format(d.hour));
         focus.select('#tooltip-concentration').text('y = ' + d.concentration.toFixed(2));
     }
-}
\ No newline at end of file
+}
diff --git a/cara/apps/expert.py b/cara/apps/expert.py
index c29cea76..664f97b3 100644
--- a/cara/apps/expert.py
+++ b/cara/apps/expert.py
@@ -140,7 +140,7 @@ class ExposureModelResult(View):
             ax.spines['top'].set_visible(False)
 
             ax.set_xlabel('Time (hours)')
-            ax.set_ylabel('Concentration ($q/m^3$)')
+            ax.set_ylabel('Concentration ($virions/m^{3}$)')
             ax.set_title('Concentration of virions')
         else:
             self.ax.ignore_existing_data_limits = True
@@ -185,7 +185,7 @@ class ExposureComparissonResult(View):
         ax.spines['right'].set_visible(False)
         ax.spines['top'].set_visible(False)
         ax.set_xlabel('Time (hours)')
-        ax.set_ylabel('Concentration ($q/m^3$)')
+        ax.set_ylabel('Concentration ($virions/m^{3}$)')
         ax.set_title('Concentration of virions')
         return ax