diff --git a/app/covid-calculator.ipynb b/app/covid-calculator.ipynb
deleted file mode 100644
index f663be53..00000000
--- a/app/covid-calculator.ipynb
+++ /dev/null
@@ -1,370 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "code",
-   "execution_count": 182,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import ipywidgets as w"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 183,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
-   "outputs": [],
-   "source": [
-    "name_text = w.Text(placeholder=\"E.g. Workshop without masks\", description=\"Simulation name:\",\n",
-    "                   style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "room_number_text = w.Text(placeholder=\"E.g. 17/R-033\", description=\"Room number:\",\n",
-    "                          style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "intro_box = w.VBox(children=(w.HTML(value='<font size=\"+2\"><b>CARA</b> Covid Calculator</font>'),\n",
-    "                             name_text,\n",
-    "                             room_number_text),\n",
-    "                   layout=w.Layout(padding='0px 0px 50px 0px'))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 184,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
-   "outputs": [],
-   "source": [
-    "volume_text = w.Text(placeholder=\"Room volume (m³)\", description=\"Room volume\", layout=w.Layout(width='auto'))\n",
-    "area_text = w.Text(placeholder=\"Room floor area (m²)\", description=\"Floor area\", layout=w.Layout(width='auto'))\n",
-    "height_text = w.Text(placeholder=\"Room ceiling height (m²)\", description=\"Ceiling height\", layout=w.Layout(width='auto'))\n",
-    "\n",
-    "room_dimensions_box = w.VBox(children=(volume_text, w.Label(value=\"------- OR -------\"),area_text, height_text),\n",
-    "                             layout=w.Layout(padding='0px 0px 50px 0px'))\n",
-    "\n",
-    "def manage_room_text_fields(_):\n",
-    "    volume_text.disabled = bool(area_text.value) or bool(height_text.value)\n",
-    "    area_text.disabled = bool(volume_text.value)\n",
-    "    height_text.disabled = bool(volume_text.value)\n",
-    "\n",
-    "for text in [volume_text, area_text, height_text]:\n",
-    "    text.observe(manage_room_text_fields)\n",
-    "    text.style.description_width = \"auto\"\n",
-    "\n",
-    "volume_text.observe(manage_room_text_fields)\n",
-    "area_text.observe(manage_room_text_fields)\n",
-    "height_text.observe(manage_room_text_fields)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 185,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
-   "outputs": [],
-   "source": [
-    "ventilation_label = w.Label(\"Ventilation type:\")\n",
-    "mechanical_button = w.ToggleButton(value=False, description='Mechanical', layout={'width': 'auto'})\n",
-    "natural_button = w.ToggleButton(value=False, description='Natural', layout={'width': 'auto'})\n",
-    "\n",
-    "acph_text = w.Text(description=\"Air changes per hour\", style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "asfr_text = w.Text(description=\"Air supply flow rate\", style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "\n",
-    "w.jsdlink((acph_text, 'value'), (asfr_text, 'disabled'))\n",
-    "w.jsdlink((asfr_text, 'value'), (acph_text, 'disabled'))\n",
-    "\n",
-    "mech_vent_box = w.VBox(\n",
-    "    children=(acph_text, w.Label(value=\"------- OR -------\"), asfr_text),\n",
-    "    layout=w.Layout(display='none', width='auto')\n",
-    ")\n",
-    "\n",
-    "number_of_windows_text = w.Text(description='Number of windows:', style={'description_width': 'auto'},\n",
-    "                                layout=w.Layout(width='auto'))\n",
-    "height_of_window_text = w.Text(description='Height of window:', placeholder='meters',\n",
-    "                               style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "width_of_window_text = w.Text(description='Width of window:', placeholder='meters', style={'description_width': 'auto'},\n",
-    "                              layout=w.Layout(width='auto'))\n",
-    "opening_distance_text = w.Text(description='Opening distance:', placeholder='centimeters', style={'description_width': 'auto'},\n",
-    "                               layout=w.Layout(width='auto'))\n",
-    "window_open_buttons = w.RadioButtons(options=('Always', '15 min / 2h'), layout=w.Layout(width='auto'))\n",
-    "\n",
-    "nat_vent_box = w.VBox(\n",
-    "    children=(\n",
-    "        number_of_windows_text,\n",
-    "        opening_distance_text,\n",
-    "        width_of_window_text,\n",
-    "        opening_distance_text,\n",
-    "        w.HBox(children=(\n",
-    "            w.Label('Windows open', layout=w.Layout(width='auto')),\n",
-    "            window_open_buttons\n",
-    "        ))\n",
-    "    ),\n",
-    "    layout=w.Layout(display='none', width='auto'),\n",
-    ")\n",
-    "\n",
-    "\n",
-    "\n",
-    "tab_bar = w.HBox(children=(mechanical_button, natural_button))\n",
-    "ventilation_type_menu = w.VBox(children=(ventilation_label, tab_bar), layout=w.Layout(padding='0px 0px 20px 0px'))\n",
-    "ventilation_box = w.VBox(children=(ventilation_type_menu, mech_vent_box, nat_vent_box),\n",
-    "                         layout=w.Layout(padding='0px 0px 50px 0px'))\n",
-    "\n",
-    "def handle_natural_toggle(_):\n",
-    "    if natural_button.value:\n",
-    "        mechanical_button.value = False\n",
-    "        ventilation_box.children[2].layout.display = 'contents'\n",
-    "    else:\n",
-    "        ventilation_box.children[2].layout.display = 'none'\n",
-    "\n",
-    "def handle_mechanical_toggle(_):\n",
-    "    if mechanical_button.value:\n",
-    "        natural_button.value = False\n",
-    "        ventilation_box.children[1].layout.display = 'contents'\n",
-    "    else:\n",
-    "        ventilation_box.children[1].layout.display = 'none'\n",
-    "\n",
-    "natural_button.observe(handle_natural_toggle)\n",
-    "mechanical_button.observe(handle_mechanical_toggle)\n",
-    "left_column = w.VBox(children=(intro_box, room_dimensions_box, ventilation_box),\n",
-    "                     layout=w.Layout(width='25%', padding=\"0px 20px 0px 0px\"))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 186,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    },
-    "scrolled": false
-   },
-   "outputs": [],
-   "source": [
-    "event_data_label = w.Label(\"Event data:\")\n",
-    "attendees_label = w.Label(\"Attendees:\")\n",
-    "total_people_text = w.Text(description=\"Total number of people:\", style={'description_width': 'auto'},\n",
-    "                           layout=w.Layout(width='auto'))\n",
-    "infected_people_text = w.Text(description=\"Number of infected people:\", style={'description_width': 'auto'},\n",
-    "                              layout=w.Layout(width='auto'))\n",
-    "activity_dropdown = w.Dropdown(description=\"Activity type:\", options=[\"Training\", \"Workshop\", \"Office\"], value=None,\n",
-    "                               layout=w.Layout(width='auto'))\n",
-    "start_hour = w.Dropdown(options=[\"HH\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(24)], value=\"HH\")\n",
-    "start_minute = w.Dropdown(options=[\"MM\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(60)], value=\"MM\")\n",
-    "finish_hour = w.Dropdown(options=[\"HH\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(24)], value=\"HH\")\n",
-    "finish_minute = w.Dropdown(options=[\"MM\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(60)], value=\"MM\")\n",
-    "start_box = w.VBox(children=(w.Label(\"Start:\"),\n",
-    "                             w.HBox(children=(start_hour, start_minute))),\n",
-    "                   layout=w.Layout(padding=\"0px 20px 0px 0px\"))\n",
-    "finish_box = w.VBox(children=(w.Label(\"Finish:\"),\n",
-    "                              w.HBox(children=(finish_hour, finish_minute))))\n",
-    "event_time_box = w.HBox(children=(start_box, finish_box), layout=w.Layout(width='auto'))\n",
-    "\n",
-    "event_intro_box = w.VBox(children=(event_data_label,\n",
-    "                                   attendees_label,\n",
-    "                                   total_people_text,\n",
-    "                                   infected_people_text,\n",
-    "                                   activity_dropdown,\n",
-    "                                   event_time_box),\n",
-    "                         layout=w.Layout(padding=\"50px 0px 20px 0px\"))\n",
-    "\n",
-    "months = (\"january\", \"february\", \"march\", \"april\", \"may\", \"june\",\n",
-    "          \"july\", \"august\", \"september\", \"october\", \"november\", \"december\")\n",
-    "\n",
-    "single_button = w.ToggleButton(value=False, description='Single event', layout={'width': 'auto'})\n",
-    "recurrent_button = w.ToggleButton(value=False, description='Recurrent usage', layout={'width': 'auto'})\n",
-    "single_recurrent_selection_bar = w.HBox(children=(single_button, recurrent_button), layout=w.Layout(width='auto'), style={'description_width': 'auto'})\n",
-    "month_dropdown = w.Dropdown(options=months, value=None, description=\"Month:\", layout=w.Layout(width='auto'), style={'description_width': 'auto'})\n",
-    "day_dropdown = w.Dropdown(options=[i for i in range(1, 32)], value=None, description=\"Day:\", layout=w.Layout(width='auto'))\n",
-    "date_selector = w.HBox(children=(month_dropdown, day_dropdown), layout=w.Layout(display='none', width='auto'))\n",
-    "\n",
-    "months_bar = w.HBox(children=[w.ToggleButton(value=False, description=month[0].upper()) for month in months],\n",
-    "                    layout = w.Layout(display='none'))\n",
-    "\n",
-    "def handle_single_click(_):\n",
-    "    if single_button.value:\n",
-    "        date_selector.layout.display = 'contents'\n",
-    "        recurrent_button.value = False\n",
-    "    else:\n",
-    "        date_selector.layout.display = 'none'\n",
-    "\n",
-    "def handle_recurrent_click(_):\n",
-    "    if recurrent_button.value:\n",
-    "        months_bar.layout.display = 'contents'\n",
-    "        single_button.value = False\n",
-    "    else:\n",
-    "        months_bar.layout.display = 'none'\n",
-    "\n",
-    "single_button.observe(handle_single_click)\n",
-    "recurrent_button.observe(handle_recurrent_click)\n",
-    "\n",
-    "date_box = w.VBox(children=(w.HBox(children=(single_button, recurrent_button)),\n",
-    "                            w.HBox(children=(date_selector, months_bar))),\n",
-    "                  layout=w.Layout(padding=\"0px 0px 30px 0px\"))\n",
-    "\n",
-    "lunch_start_hour = w.Dropdown(options=[\"HH\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(24)],\n",
-    "                              value=\"HH\", disabled=True)\n",
-    "lunch_start_minute = w.Dropdown(options=[\"MM\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(60)],\n",
-    "                                value=\"MM\", disabled=True)\n",
-    "lunch_finish_hour = w.Dropdown(options=[\"HH\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(24)],\n",
-    "                               value=\"HH\", disabled=True)\n",
-    "lunch_finish_minute = w.Dropdown(options=[\"MM\"] + [(\"0\" + str(i)) if len(str(i)) == 1 else str(i) for i in range(60)],\n",
-    "                                 value=\"MM\", disabled=True)\n",
-    "lunch_start_box = w.VBox(children=(w.Label(\"Start:\"),\n",
-    "                                   w.HBox(children=(lunch_start_hour, lunch_start_minute))),\n",
-    "                         layout=w.Layout(padding=\"0px 20px 0px 0px\"))\n",
-    "lunch_finish_box = w.VBox(children=(w.Label(\"Finish:\"),\n",
-    "                                    w.HBox(children=(lunch_finish_hour, lunch_finish_minute))))\n",
-    "lunch_time_box = w.HBox(children=(lunch_start_box, lunch_finish_box), layout=w.Layout(width='auto'))\n",
-    "\n",
-    "lunch_button = w.ToggleButton(value=False, description=\"Lunch break\")\n",
-    "\n",
-    "def handle_lunch(_):\n",
-    "    for dropdown in (lunch_start_hour, lunch_start_minute, lunch_finish_hour, lunch_finish_minute):\n",
-    "        dropdown.disabled = not lunch_button.value\n",
-    "\n",
-    "lunch_button.observe(handle_lunch)\n",
-    "\n",
-    "lunch_break_box = w.VBox(children=(lunch_button, lunch_time_box), layout=w.Layout(padding='0px 0px 20px 0px'))\n",
-    "\n",
-    "coffee_button = w.ToggleButton(value=False, description=\"Coffee breaks\")\n",
-    "coffee_breaks_text = w.Text(description=\"Number of breaks:\", disabled=True, style={'description_width': 'auto'},\n",
-    "                            layout=w.Layout(width='auto'))\n",
-    "coffee_duration = w.Dropdown(description=\"Duration:\", options=[\"MM\"] + [str(i) for i in range(1, 31)], value=\"MM\",\n",
-    "                             disabled=True, style={'description_width': 'auto'}, layout=w.Layout(width='auto'))\n",
-    "regular_breaks_label = w.Label(\"Regular breaks are spread evenly throughout the day\")\n",
-    "coffee_break_box = w.VBox(children=(coffee_button, coffee_breaks_text, coffee_duration, regular_breaks_label))\n",
-    "def handle_coffee_button(_):\n",
-    "    coffee_duration.disabled = not coffee_button.value\n",
-    "    coffee_breaks_text.disabled = not coffee_button.value\n",
-    "\n",
-    "coffee_button.observe(handle_coffee_button)\n",
-    "break_box = w.VBox(children=(lunch_break_box, coffee_break_box))\n",
-    "\n",
-    "middle_column = w.VBox(children=(event_intro_box, date_box, break_box),\n",
-    "                       layout=w.Layout(width='40%', padding='0px 20px 0px 0px'))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 187,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
-   "outputs": [],
-   "source": [
-    "mask_label = w.Label(\"Mask wearing:\")\n",
-    "mask_buttons = w.ToggleButtons(options=[\"Continuous\", \"Removed when seated >2m\"])\n",
-    "mask_box = w.VBox(children=(mask_label, mask_buttons), layout=w.Layout(padding='50px 0px 30px 0px'))\n",
-    "\n",
-    "info_box = w.HTML(value='<style>p{font-size:0.875em; line-height:1.2}</style>'\n",
-    "                        '<p>This tool estimates the risk of COVID-19 spread. It is based on current scientific data and '\n",
-    "                        'can be used to provide an illustration for different real world scenarios.</p><p><br></p>'\n",
-    "                        '<p style=\"text-align: center;\"><strong>How to use this tool:</strong></p>'\n",
-    "                        '<p style=\"text-align: center;\"><strong>Room data</strong></p>'\n",
-    "                        '<p>Enter the data about the area you wish to study. You can find these in GIS, or by measuring '\n",
-    "                        'them yourself.</p><p>For mechanical ventilation, you should check with a specialist for the '\n",
-    "                        'air flow or air change rate.</p><p><br></p>'\n",
-    "                        '<p style=\"text-align: center;\"><strong>Event data</strong></p>'\n",
-    "                        '<p>Enter the total number of people and how many you assume are infected.</p><p><br></p>'\n",
-    "                        '<p style=\"text-align: center;\"><strong>Activity types:</strong></p>'\n",
-    "                        '<p>Office = typical scenario all persons seated, talking quietly.</p>'\n",
-    "                        '<p>Workshop = assembly workshop environment, all persons doing light exercise, talking.</p>'\n",
-    "                        '<p>Training = one person standing, talking, all others seated, breathing normally.</p>'\n",
-    "                        '<p>Seminar = As training, but all participants take turns in standing and talking.</p>'\n",
-    "                        '<p>You should specify if the event is a one off (give date) or recurrent use of the same space '\n",
-    "                        'for the same activity, in which case tick the months when the activity takes place.</p>'\n",
-    "                        '<p>Specify if a lunch break should be included, and when it starts/stops.</p>'\n",
-    "                        '<p>If you will take coffee breaks, they are spread out evenly throughout the day, '\n",
-    "                        'in addition to lunch.</p><p>Mask wearing: Specify if they are worn all the time, '\n",
-    "                        'or only when less than 2 meters apart.</p>',\n",
-    "                  layout=w.Layout(padding='0px 0px 30px 0px'))\n",
-    "\n",
-    "report_button = w.Button(description=\"Generate report\")\n",
-    "\n",
-    "right_column = w.VBox(children=(mask_box, info_box, report_button), layout=w.Layout(width='35%'))\n",
-    "\n",
-    "components = {'name_text', 'room_number_text', 'volume_text', 'area_text', 'height_text', 'mechanical_button',\n",
-    "              'acph_text', 'asfr_text', 'natural_button', 'number_of_windows_text', 'height_of_window_text',\n",
-    "              'width_of_window_text', 'opening_distance_text', 'opening_distance_text', 'window_open_buttons',\n",
-    "              'total_people_text', 'infected_people_text', 'activity_dropdown', 'start_hour', 'start_minute',\n",
-    "              'finish_hour', 'finish_minute', 'single_button', 'recurrent_button', 'month_dropdown', 'day_dropdown',\n",
-    "              'lunch_button', 'lunch_start_hour', 'lunch_start_minute', 'lunch_finish_hour', 'lunch_finish_minute',\n",
-    "              'coffee_button', 'coffee_breaks_text', 'coffee_duration', 'mask_buttons'}\n",
-    "components.update(set(months))\n",
-    "\n",
-    "def get_value(component_name: str):\n",
-    "    assert component_name in components, f\"{component_name} is not the name of any UI-element with a value-attribute. \" \\\n",
-    "                                         \"Valid names are:\\n\" + '\\n'.join(sorted(components))\n",
-    "    if component_name in months:\n",
-    "        return months_bar.children[months.index(component_name)].value\n",
-    "\n",
-    "    return globals()[component_name].value"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 188,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
-   "outputs": [
-    {
-     "data": {
-      "application/vnd.jupyter.widget-view+json": {
-       "model_id": "ed8a32168798491b94b149a42af469a2",
-       "version_major": 2,
-       "version_minor": 0
-      },
-      "text/plain": [
-       "HBox(children=(VBox(children=(VBox(children=(HTML(value='<font size=\"+2\"><b>CARA</b> Covid Calculator</font>')…"
-      ]
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    }
-   ],
-   "source": [
-    "w.HBox(children=(left_column, middle_column, right_column))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.8.5"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 1
-}
\ No newline at end of file