Add flu nasal spray half dose question (#426)

This adds a new question which is only asked for the Fluent flu nasal
spray.

The nasal spray is designed to be given in both nostrils. However as it
is given to children, if the child responds in a way that makes it
difficult or too traumatic to do the spray in the second nostril, then a
single dose can be given and should remain effective.

We’ve been asked by UKSHA to record whether a full or half dose was
given, for vaccine effectiveness monitoring.

## Screenshots

### New question

<img width="800" height="412" alt="Screenshot 2025-08-28 at 11 54 22"
src="https://github.com/user-attachments/assets/472981dd-90b1-48b2-990c-76faade229f4"
/>

### Showing error message (if neither option selected)

<img width="821" height="640" alt="Screenshot 2025-08-28 at 11 45 17"
src="https://github.com/user-attachments/assets/fd982038-a4e2-4f27-8c2a-0e65f2d94592"
/>

## Shown on the Check answers page

<img width="702" height="577" alt="Screenshot 2025-08-28 at 13 10 47"
src="https://github.com/user-attachments/assets/e342e750-f238-404a-acf8-f7b212170622"
/>

---------

Co-authored-by: Anna-Sutton <[email protected]>
Co-authored-by: Frankie Roberto <[email protected]>
Co-authored-by: Frankie Roberto <[email protected]>

Author: 3 people

app/routes/record-vaccinations.js

@@ -658,6 +658,7 @@ module.exports = router => {
       data.consentAdvocateName = ""
       data.consentDeputyName = ""
       data.healthcareWorker = ""
+      data.doseAmount = ""
     }
 
     if (answer === 'same-vaccination-another-patient') {
@@ -689,6 +690,7 @@ module.exports = router => {
       req.session.data.vaccineProduct = ""
       req.session.data.vaccineBatch = ""
       req.session.data.eligibility = ""
+      req.session.data.nhsNumber = ""
 
       res.redirect('/record-vaccinations/vaccine')
     } else {
@@ -1001,11 +1003,55 @@ router.get('/record-vaccinations/check', (req, res) => {
     const otherInjectionSite = data.otherInjectionSite
     let redirectPath = "/record-vaccinations/check"
 
+
     if (!injectionSite || (injectionSite === "other" && !otherInjectionSite)) {
       redirectPath = "/record-vaccinations/injection-site?showErrors=yes"
+    } else if (data.vaccineProduct == "Fluenz (LAIV)") {
+
+      // Fluenz is a nasal spray which gets an extra question
+      redirectPath = "/record-vaccinations/dose-amount"
     }
 
     res.redirect(redirectPath)
   })
 
+  router.get('/record-vaccinations/dose-amount', (req, res) => {
+    const data = req.session.data
+    const doseAmount = data.doseAmount
+
+    let errors = []
+    let doseAmountError
+
+    if (req.query.showErrors === "yes") {
+
+      if (!doseAmount || doseAmount === "") {
+        doseAmountError = {
+          text: "Select yes if you gave a full dose",
+          href: "#dose-amount"
+        }
+        errors.push(doseAmountError)
+      }
+    }
+
+    res.render('record-vaccinations/dose-amount', {
+      errors,
+      doseAmountError
+    })
+  })
+
+  router.post('/record-vaccinations/answer-dose-amount', (req, res) => {
+    const data = req.session.data
+    const doseAmount = data.doseAmount
+    let redirectPath
+
+
+    if (doseAmount && doseAmount != "") {
+      res.redirect("/record-vaccinations/check")
+    } else {
+
+      // Redirect back to the question and show an error
+      res.redirect("/record-vaccinations/dose-amount?showErrors=yes")
+    }
+  })
+
 }

app/views/record-vaccinations/check.html

@@ -232,7 +232,7 @@ <h2 class="nhsuk-heading-m">Vaccination</h2>
               ]
             }
           },
-          {          
+          {
             key: {
               text: "Vaccinator"
             },
@@ -350,7 +350,24 @@ <h2 class="nhsuk-heading-m">Vaccination</h2>
                 }
               ]
             }
-          }
+          },
+          {
+            key: {
+              text: "Dose"
+            },
+            value: {
+              text: data.doseAmount
+            },
+            actions: {
+              items: [
+                {
+                  href: "/record-vaccinations/dose-amount",
+                  text: "Change",
+                  visuallyHiddenText: "dose amount"
+                }
+              ]
+            }
+          } if data.doseAmount
         ]
       }) }}
 

app/views/record-vaccinations/dose-amount.html

@@ -0,0 +1,59 @@
+{% extends 'layout.html' %}
+
+{% set pageName = "Did you give a full dose of the vaccine?" %}
+
+{% set currentSection = "vaccinate" %}
+
+{% block beforeContent %}
+  {{ backLink({ href: "/record-vaccinations/injection-site" }) }}
+{% endblock %}
+
+{% block content %}
+  <div class="nhsuk-grid-row">
+    <div class="nhsuk-grid-column-two-thirds">
+
+      {% if (errors | length) > 0 %}
+        {{ errorSummary({
+          titleText: "There is a problem",
+          errorList: errors
+        }) }}
+      {% endif %}
+
+      <form action="/record-vaccinations/answer-dose-amount" method="post" novalidate>
+
+        {{ radios({
+          idPrefix: "dose-amount",
+          name: "doseAmount",
+          fieldset: {
+            legend: {
+              text: ("Did you give a full dose of the vaccine?" if data.vaccinationToday == 'yes' else "Was a full dose of the vaccine given?"),
+              classes: "nhsuk-fieldset__legend--l",
+              isPageHeading: true
+            }
+          },
+          value: data.doseAmount,
+          errorMessage: {
+            text: doseAmountError.text
+          } if doseAmountError,
+          items: [
+            {
+              value: "Both nostrils (full dose)",
+              text: "Yes, both nostrils"
+            },
+            {
+              value: "1 nostril only (half dose)",
+              text: "No, 1 nostril only"
+            }
+          ]
+        }) }}
+
+        {{ button({
+          text: "Continue"
+        })}}
+      </form>
+
+    </div>
+  </div>
+
+{% endblock %}
+