diff --git a/cara/apps/calculator/__init__.py b/cara/apps/calculator/__init__.py
index 1688d494..a60d5f74 100644
--- a/cara/apps/calculator/__init__.py
+++ b/cara/apps/calculator/__init__.py
@@ -33,7 +33,7 @@ from .user import AuthenticatedUser, AnonymousUser
 # calculator version. If the calculator needs to make breaking changes (e.g. change
 # form attributes) then it can also increase its MAJOR version without needing to
 # increase the overall CARA version (found at ``cara.__version__``).
-__version__ = "3.0.0"
+__version__ = "3.0.1"
 
 
 class BaseRequestHandler(RequestHandler):
diff --git a/cara/apps/calculator/templates/calculator.form.html.j2 b/cara/apps/calculator/templates/calculator.form.html.j2
index c119d4e5..65391454 100644
--- a/cara/apps/calculator/templates/calculator.form.html.j2
+++ b/cara/apps/calculator/templates/calculator.form.html.j2
@@ -65,7 +65,7 @@ v{{ calculator_version }} <span style="float:right; font-weight:bold">Please sen
           <option value="SARS_CoV_2">SARS-CoV-2 (nominal strain)</option>
           <option value="SARS_CoV_2_B117">SARS-CoV-2 (Alpha VOC)</option>
           <option value="SARS_CoV_2_P1">SARS-CoV-2 (Gamma VOC)</option>
-          <option value="SARS_CoV_2_B16172">SARS-CoV-2 (Delta VOC)</option>
+          <option selected value="SARS_CoV_2_B16172">SARS-CoV-2 (Delta VOC)</option>
         </select>
     </div>
 
@@ -344,13 +344,13 @@ v{{ calculator_version }} <span style="float:right; font-weight:bold">Please sen
   <b>Quick Guide:</b><br>
   This tool simulates the long range airborne spread SARS-CoV-2 virus in a finite volume and estimates the risk of COVID-19 infection. It is based on current scientific data and can be used to compare the effectiveness of different mitigation measures.<br>
   <b>Virus data:</b> <br>
-  SARS-CoV-2 covers typical strains of the virus and three variants of concern (VOC):<br>
+  SARS-CoV-2 covers the original "wild type" strain of the virus and three variants of concern (VOC):<br>
   <ul>
     <li>Alpha (also known as B.1.1.7, first identified in UK, Dec 2020),</li>
     <li>Gamma (also known as P.1, first identified in Brazil/Japan, Jan 2021).</li>
     <li>Delta (also known as B.1.617.2, first identified in India, Oct 2020).</li>
   </ul>
-  Choose variant according to local area prevalence, e.g. for <a href="https://www.covid19.admin.ch/fr/epidemiologic/virus-variants?detGeo=GE">Geneva</a>
+  Modify the default as necessary, according to local area prevalence e.g. for <a href="https://www.covid19.admin.ch/fr/epidemiologic/virus-variants?detGeo=GE">Geneva</a>
   or <a href="https://www.santepubliquefrance.fr/dossiers/coronavirus-covid-19/covid-19-cartographie-des-variants-en-france-donnees-par-region-et-par-departement">Ain (France)</a>.<br>
   <b>Ventilation data:</b> <br>
   <ul>
diff --git a/cara/apps/calculator/templates/userguide.html.j2 b/cara/apps/calculator/templates/userguide.html.j2
index ede8c8e3..f51cba61 100644
--- a/cara/apps/calculator/templates/userguide.html.j2
+++ b/cara/apps/calculator/templates/userguide.html.j2
@@ -56,12 +56,12 @@ Changing this setting alters the properties of the virus which are used for the
 This has a significant effect on the probability of infection. 
 The choices are:</p>
 <ul>
-<li><code>SARS-CoV-2 (nominal strain)</code>, covering typical strains and varaints which are not of concern from an epidemiologic point of view of the virus;</li>
+<li><code>SARS-CoV-2 (nominal strain)</code>, covering typical strains and variants which are not of concern from an epidemiologic point of view of the virus;</li>
 <li><code>SARS-CoV-2 (Alpha VOC)</code>, first identified in the UK at the end of 2020 which is found to be approximately 1.5x more transmissible compared to the non-VOCs; </li>
 <li><code>SARS-CoV-2 (Gamma VOC)</code>, first identified in Brazil in January 2021 which is found to be approximately 2.2x more transmissible compared to the non-VOCs.</li>
 <li><code>SARS-CoV-2 (Delta VOC)</code>, first identified in India towards the end of 2020 which is found to be approximately 60% more transmissible compared to the ALPHA VOC.</li>
 </ul>
-<p>The user can base their choice according to the prevalence of the different variants in the local area. Access to this information can be found here:</p>
+<p>The user can modify the selected variant from the default, according to the prevalence of the different variants in the local area. Access to this information can be found here:</p>
 <ul>
 <li>Geneva: <a href="https://www.covid19.admin.ch/fr/epidemiologic/virus-variants?detGeo=GE">https://www.covid19.admin.ch/fr/epidemiologic/virus-variants?detGeo=GE</a></li>
 <li>Ain (France): <a href="https://www.santepubliquefrance.fr/dossiers/coronavirus-covid-19/covid-19-cartographie-des-variants-en-france-donnees-par-region-et-par-departement">https://www.santepubliquefrance.fr/dossiers/coronavirus-covid-19/covid-19-cartographie-des-variants-en-france-donnees-par-region-et-par-departement</a></li>