diff --git a/src/components/Main/Scenario/ScenarioCardEpidemiological.tsx b/src/components/Main/Scenario/ScenarioCardEpidemiological.tsx
index aca3b2f75..fe7f407e8 100644
--- a/src/components/Main/Scenario/ScenarioCardEpidemiological.tsx
+++ b/src/components/Main/Scenario/ScenarioCardEpidemiological.tsx
@@ -47,7 +47,7 @@ function ScenarioCardEpidemiological({ errors, touched }: ScenarioCardEpidemiolo
         label={`${t('Latency')} [${t('days')}]`}
         help={t('Time from infection to onset of symptoms (here onset of infectiousness)')}
         step={0.1}
-        min={0}
+        min={1}
         errors={errors}
         touched={touched}
       />
@@ -58,7 +58,7 @@ function ScenarioCardEpidemiological({ errors, touched }: ScenarioCardEpidemiolo
           'Average number of days a person is infectious. Over this time, R0 infections happen on average. Together with the latency time, this defines the serial interval. The longer the serial interval, the slower the outbreak.',
         )}
         step={0.1}
-        min={0}
+        min={1}
         errors={errors}
         touched={touched}
       />
@@ -84,7 +84,7 @@ function ScenarioCardEpidemiological({ errors, touched }: ScenarioCardEpidemiolo
         label={`${t('Hospital stay')} [${t('days')}]`}
         help={t('Average number of days a severe case stays in regular hospital beds')}
         step={0.1}
-        min={0}
+        min={1}
         errors={errors}
         touched={touched}
       />
@@ -93,7 +93,7 @@ function ScenarioCardEpidemiological({ errors, touched }: ScenarioCardEpidemiolo
         label={`${t('ICU stay')} [${t('days')}]`}
         help={t('Average number of days a critical case stays in the ICU')}
         step={0.1}
-        min={0}
+        min={1}
         errors={errors}
         touched={touched}
       />
diff --git a/src/components/Main/validation/schema.ts b/src/components/Main/validation/schema.ts
index c613b2d71..7846da152 100644
--- a/src/components/Main/validation/schema.ts
+++ b/src/components/Main/validation/schema.ts
@@ -10,6 +10,7 @@ const ageRegions = [...ageDistributionNames, CUSTOM_COUNTRY_NAME]
 const MSG_REQUIRED = i18next.t('Value is required')
 const MSG_NON_NEGATIVE = i18next.t('Should be non-negative (or zero)')
 const MSG_POSITIVE = i18next.t('Should be strictly positive (non-zero)')
+const MSG_AT_LEAST_ONE_DAY = i18next.t('Should be at least one day or greater')
 
 export function dateRange() {
   return yup.object({
@@ -38,13 +39,13 @@ export const schema = yup.object().shape({
   epidemiological: yup.object().shape({
     r0: yup.number().required(MSG_REQUIRED).min(0, MSG_NON_NEGATIVE),
 
-    latencyTime: yup.number().required(MSG_REQUIRED).positive(MSG_POSITIVE),
+    latencyTime: yup.number().required(MSG_REQUIRED).min(1, MSG_AT_LEAST_ONE_DAY),
 
-    infectiousPeriod: yup.number().required(MSG_REQUIRED).positive(MSG_POSITIVE),
+    infectiousPeriod: yup.number().required(MSG_REQUIRED).min(1, MSG_AT_LEAST_ONE_DAY),
 
-    lengthHospitalStay: yup.number().required(MSG_REQUIRED).positive(MSG_POSITIVE),
+    lengthHospitalStay: yup.number().required(MSG_REQUIRED).min(1, MSG_AT_LEAST_ONE_DAY),
 
-    lengthICUStay: yup.number().required(MSG_REQUIRED).positive(MSG_POSITIVE),
+    lengthICUStay: yup.number().required(MSG_REQUIRED).min(1, MSG_AT_LEAST_ONE_DAY),
 
     seasonalForcing: yup.number().required(MSG_REQUIRED).min(0, MSG_NON_NEGATIVE),