diff --git a/cara/apps/calculator/report_generator.py b/cara/apps/calculator/report_generator.py
index db6db86b..e0904dd4 100644
--- a/cara/apps/calculator/report_generator.py
+++ b/cara/apps/calculator/report_generator.py
@@ -27,7 +27,6 @@ def calculate_report_data(model: models.Model):
         "R0": r0,
     }
 
-
 def build_report(model: models.Model, form: FormData):
     now = datetime.now()
     time = now.strftime("%d/%m/%Y %H:%M:%S")
diff --git a/cara/apps/calculator/static/css/report.css b/cara/apps/calculator/static/css/report.css
index 0ad87e49..00070236 100644
--- a/cara/apps/calculator/static/css/report.css
+++ b/cara/apps/calculator/static/css/report.css
@@ -16,6 +16,10 @@ h1 {
 	padding-bottom: 15pt;
 }
 
+p.data_italic {
+	font-style: italic;
+}
+
 p.data_title {
 	font-weight: bold;
 }
diff --git a/cara/apps/calculator/static/form.html b/cara/apps/calculator/static/form.html
index b3944bc1..bd4c9df8 100644
--- a/cara/apps/calculator/static/form.html
+++ b/cara/apps/calculator/static/form.html
@@ -42,7 +42,7 @@ Beta v1.0.0 <span style="float:right; font-weight:bold">Please send feedback to
 
     <div id="DIVmechanical_ventilation" style="display:none">
         <input type="radio" id="air_type_supply" name="air_type" value="air_supply" onclick="require_fields(this)">
-        Air supply flow rate &nbsp;&nbsp; <input type="number" step=0.01 id="air_supply" name="air_supply" min="0"><br>
+        Air supply flow rate &nbsp;&nbsp; <input type="number" step=0.01 id="air_supply" name="air_supply" min="0" placeholder="(m³)"><br>
         <input type="radio" id="air_type_changes" name="air_type" value="air_changes" onclick="require_fields(this)">
         Air changes per hour &nbsp;&nbsp; <input type="number" step=0.01 id="air_changes" name="air_changes" min="0"><br>
     </div>
@@ -89,14 +89,14 @@ Beta v1.0.0 <span style="float:right; font-weight:bold">Please send feedback to
     Finish: <input type="time" id="infected_finish" name="infected_finish" value="18:00" required><br>
     <hr width="80%">
 
-    <span class="natural disabled">When is the event?</span><br>
-    <input type="radio" id="event_type_single" name="event_type" class="natural disabled" value="single_event" onclick="require_fields(this)" disabled></input>
-    <label for="event_type_single" class="natural disabled">Single event</label> &nbsp;&nbsp;
-    <label for="datepicker" class="natural disabled">Date: </label>
-    <input type="text" id="datepicker" class="natural disabled" name="single_event_date" disabled unrequired><br>
-    <input type="radio" id="event_type_recurrent" name="event_type" class="natural disabled" value="recurrent_event" onclick="require_fields(this)" disabled></input>
-    <label for="event_type_recurrent" class="natural disabled">Recurrent usage</label>
-    <select id="recurrent_event_month" name="recurrent_event_month" class="natural disabled" disabled>
+    When is the event?<br>
+    <input type="radio" id="event_type_single" name="event_type" value="single_event" onclick="require_fields(this)"></input>
+    <label for="event_type_single">Single event</label> &nbsp;&nbsp;
+    <label for="datepicker">Date: </label>
+    <input type="text" id="datepicker" name="single_event_date"><br>
+    <input type="radio" id="event_type_recurrent" name="event_type" value="recurrent_event" onclick="require_fields(this)"></input>
+    <label for="event_type_recurrent">Recurrent usage</label>
+    <select id="recurrent_event_month" name="recurrent_event_month">
         <option value="January">January</option>
         <option value="February">February</option>
         <option value="March">March</option>
diff --git a/cara/apps/calculator/static/js/form.js b/cara/apps/calculator/static/js/form.js
index 7e6cabed..d11f3ace 100644
--- a/cara/apps/calculator/static/js/form.js
+++ b/cara/apps/calculator/static/js/form.js
@@ -21,7 +21,6 @@ function show_hide(show, hide, obj) {
       show.style.display = "none";
       obj.checked = false;
       no_ventilation.checked = true;
-      unrequire_fields(obj);
   } else if (show.style.display === "none") {
       show.style.display = "block";
       hide.style.display = "none";
@@ -71,18 +70,6 @@ function require_fields(obj){
       break;
 } }
 
-function unrequire_fields(obj){
-  switch(obj.id) {
-    case "mechanical":
-      require_mechanical_ventilation(false);
-      break;
-    case "natural":
-      require_natural_ventilation(false);
-      break;
-    default:
-      break;
-} }
-
 function require_room_volume(option) {
     $("#room_volume").prop('required',option);
 }
@@ -106,21 +93,7 @@ function require_natural_ventilation(option) {
     $("#interval").prop('required',option);
     $("#event_type_single").prop('required',option);
     $("#event_type_recurrent").prop('required',option);
-
-    document.getElementById("event_type_single").disabled = !option;
-    document.getElementById("event_type_recurrent").disabled = !option;
-
-    if (option) {
-      var elements = document.getElementsByClassName("natural disabled");
-      for(var i = elements.length - 1; i >= 0; --i)
-          elements[i].className = "natural enabled";
-    }
-    else {
-      $(".natural disabled").disabled = true
-      var elements = document.getElementsByClassName("natural enabled");
-      for(var i = elements.length - 1; i >= 0; --i)
-          elements[i].className = "natural disabled";
-} }
+}
 
 function require_air_changes(option) {
     $("#air_changes").prop('required',option);
diff --git a/cara/apps/calculator/templates/report.html.j2 b/cara/apps/calculator/templates/report.html.j2
index 9d8586dc..86a7af7e 100644
--- a/cara/apps/calculator/templates/report.html.j2
+++ b/cara/apps/calculator/templates/report.html.j2
@@ -43,6 +43,7 @@
 			<li><p class="data_subtext">Opening distance: {{ opening_distance }}</p></li>
 			<li><p class="data_subtext">Windows open: {{ windows_open }}</p></li>
 		</ul>
+			<p class="data_subtext data_italic">When using the natural ventilation option, air flows are calculated using averaged hourly temperatures for the Geneva region, based on historical data for the month selected.</p>
 		{% else %}
 		No </p></li>
 		{% endif %}
@@ -52,9 +53,23 @@
 
 	<p class="data_title">Event data:</p>
 	<ul>
-		<li><p class="data_text">Number of attendees and infected people: {{ total_people }} in attendance, of whom {{ infected_people }} are infected.</p></li>
-		<li><p class="data_text">Activity type: {{ activity_type }}</p></li>
-		<ul>
+		<li><p class="data_text">Number of attendees and infected people: {{ total_people }} in attendance, of whom {{ infected_people }} 
+		{% if infected_people == 1 %}
+		is
+		{% else %}
+		are
+		{% endif %}
+		infected.</p></li>
+		<li><p class="data_text">Activity type: 
+		{% if activity_type == "office work" %}
+		Office work – typical scenario with all persons seated, talking.
+		{% elif activity_type == "workshop" %}
+		Workshop = assembly workshop environment, all persons doing light exercise, talking.
+		{% elif activity_type == "training" %}
+		Training – one person (the trainer) standing, talking, all others seated, talking quietly (whispering). It is assumed the trainer is the infected person, for the worst case scenario.
+		{% endif %}
+		</p></li>
+			<ul>
 				<li><p class="data_subtext">Start time: {{ activity_start }} &nbsp&nbsp End time: {{ activity_finish }}</p></li>
 			</ul>
 		<li><p class="data_text">Exposure time (presence of infected person):</p></li>
@@ -72,11 +87,14 @@
 
 	<p class="data_title">Break data:</p>
 	<ul>
-		<li><p class="data_text">Lunch break: {{ lunch_option }}</li>
-		{% if lunch_option == "Yes" %}
+		<li><p class="data_text">Lunch break: 
+		{% if lunch_option%}
+		Yes</li>
 		<ul>
 			<li> Start: {{ lunch_start }} &nbsp&nbsp End: {{ lunch_finish }}</p></li>
 		</ul>
+		{% else%}
+		No</li>
 		{% endif %}
 		<li><p class="data_text">Coffee breaks: {{ coffee_breaks }}	
 		{% if coffee_breaks > 0 %}
@@ -92,12 +110,18 @@
 
 	<p class="data_title">Mask wearing:</p>
 	<ul>
-		<li><p class="data_text">Masks worn at workstations? {{ mask_wearing }}</p></li>
-		<li><p class="data_text">Mask type: Type 1 (default, for now)</p></li>
+		<li><p class="data_text">Masks worn at workstations? 
+		{% if mask_wearing == "removed" %}
+		No
+		{% else %}
+		Yes
+		{% endif %}
+		</p></li>
+		<li><p class="data_text">Mask type: Type 1</p></li>
 	</ul>
 
 	<p class="result_title">Results:</p>
-		<p class="data_text"> In this scenario, the estimated probability of one exposed occupant getting infected P(i) is {{ infection_probability }} % and the estimated basic reproduction rate (R0) rate is {{ reproduction_rate }}. This probability estimate is per simulated time period, i.e. if you have simulated a working day, which will be repeated n times per week, the cumulative probability of infection per person is n x P(i).<p>
+		<p class="data_text"> In this scenario, the estimated probability of one exposed occupant getting infected P(i) is {{ infection_probability }} % and the estimated basic reproduction rate (R0) is {{ reproduction_rate }}.<p>
 	<p class="data_title">Exposure graph:</p>
 
 	<br><br><br><br><br><br><br>