diff --git a/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPerson.kt b/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPerson.kt
index 942fe20bd7096d0eb936facb7a8e867abfc99c8c..9b751fc6ae731ab6ed5ebc1be8e89469830ebca3 100644
--- a/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPerson.kt
+++ b/Corona-Warn-App/src/main/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPerson.kt
@@ -39,7 +39,7 @@ data class VaccinatedPerson(
         val daysToImmunity = getTimeUntilImmunity(nowUTC)?.standardDays ?: return Status.INCOMPLETE
 
         return when {
-            daysToImmunity <= 0 -> Status.IMMUNITY
+            daysToImmunity < 0 -> Status.IMMUNITY
             else -> Status.COMPLETE
         }
     }
diff --git a/Corona-Warn-App/src/test/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPersonTest.kt b/Corona-Warn-App/src/test/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPersonTest.kt
index bd02d7face41c0a7a78cd705544b2e474caba389..f6b1d884f3e86404ec0b1f77a27b5c76ebabf91b 100644
--- a/Corona-Warn-App/src/test/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPersonTest.kt
+++ b/Corona-Warn-App/src/test/java/de/rki/coronawarnapp/covidcertificate/vaccination/core/VaccinatedPersonTest.kt
@@ -85,14 +85,22 @@ class VaccinatedPersonTest : BaseTest() {
         )
 
         vaccinatedPerson.apply {
+            // Less than 14 days
             getVaccinationStatus(
                 Instant.parse("2021-04-27T12:00:00.000Z")
             ) shouldBe VaccinatedPerson.Status.COMPLETE
             getVaccinationStatus(
                 Instant.parse("2021-05-10T12:00:00.000Z")
             ) shouldBe VaccinatedPerson.Status.COMPLETE
+
+            // 14 days exactly
             getVaccinationStatus(
                 Instant.parse("2021-05-11T12:00:00.000Z")
+            ) shouldBe VaccinatedPerson.Status.COMPLETE
+
+            // More than 14 days
+            getVaccinationStatus(
+                Instant.parse("2021-05-12T12:00:00.000Z")
             ) shouldBe VaccinatedPerson.Status.IMMUNITY
         }
     }