diff --git a/CoviDok/CoviDok.csproj b/CoviDok/CoviDok.csproj
index f450963..43df7ad 100644
--- a/CoviDok/CoviDok.csproj
+++ b/CoviDok/CoviDok.csproj
@@ -8,6 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.10.9" />
+    <PackageReference Include="MySql.Data.EntityFrameworkCore" Version="8.0.21" />
   </ItemGroup>
 
 </Project>
diff --git a/CoviDok/data/Assistant.cs b/CoviDok/data/Assistant.cs
new file mode 100644
index 0000000..a6df0f9
--- /dev/null
+++ b/CoviDok/data/Assistant.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Assistant
+    {
+        public string Id { get; set; }
+
+        public string Email { get; set; }
+
+        public string Password { get; set; }
+
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+
+        public DateTime RegistrationDate { get; set; }
+
+        public string DoctorId { get; set; }
+    }
+}
diff --git a/CoviDok/data/Case.cs b/CoviDok/data/Case.cs
new file mode 100644
index 0000000..d9d403c
--- /dev/null
+++ b/CoviDok/data/Case.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Case
+    {
+        public string DoctorID { get; set; }
+        public string ParentID { get; set; }
+        public string ChildID { get; set; }
+
+        public ICollection<Update> updates = new List<Update>();
+
+        public string Assignee { get; set; }
+
+
+    }
+}
diff --git a/CoviDok/data/Child.cs b/CoviDok/data/Child.cs
new file mode 100644
index 0000000..9bd3e2c
--- /dev/null
+++ b/CoviDok/data/Child.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Child
+    {
+        public string Id { get; set; }
+        public string FirstName { get; set; }
+        public string LastName { get; set; }
+        public string DoctorId { get; set; }
+        public string ParentId { get; set; }
+        public ICollection<Case> MedicalHistory { get; } = new List<Case>();
+    }
+}
diff --git a/CoviDok/data/Doctor.cs b/CoviDok/data/Doctor.cs
new file mode 100644
index 0000000..85ab01b
--- /dev/null
+++ b/CoviDok/data/Doctor.cs
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Doctor
+    {
+        public string Id { get; set; }
+
+        public string Email { get; set; }
+
+        public string Password { get; set; }
+
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+
+        public DateTime RegistrationDate { get; set; }
+
+        public ICollection<Child> Children { get; } = new List<Child>();
+
+        public ICollection<Assistant> Assistants { get; } = new List<Assistant>();
+    }
+}
diff --git a/CoviDok/data/Image.cs b/CoviDok/data/Image.cs
new file mode 100644
index 0000000..6453057
--- /dev/null
+++ b/CoviDok/data/Image.cs
@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    //Store Image ID, get actual content from MinIO backend. 
+    public class Image
+    {
+        public string ImageID { get; set; }
+
+    }
+}
diff --git a/CoviDok/data/Parent.cs b/CoviDok/data/Parent.cs
new file mode 100644
index 0000000..db1a994
--- /dev/null
+++ b/CoviDok/data/Parent.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Parent
+    {
+        public string Id { get; set; }
+
+        public string Email { get; set; }
+
+        public string Password { get; set; }
+
+        public string FirstName { get; set; }
+
+        public string LastName { get; set; }
+
+        public DateTime RegistrationDate { get; set; }
+
+        public ICollection<Child> Children { get; } = new List<Child>();
+    }
+}
diff --git a/CoviDok/data/Update.cs b/CoviDok/data/Update.cs
new file mode 100644
index 0000000..fe499d0
--- /dev/null
+++ b/CoviDok/data/Update.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace CoviDok.data
+{
+    public class Update
+    {
+        public string Sender { get; set; }
+        public string Content { get; set; }
+
+        public ICollection<Image> Images = new List<Image>();
+    }
+}