diff --git a/lua/autorun/server/menus/sv_infect_menu.lua b/lua/autorun/server/menus/sv_infect_menu.lua
index ac4df4e..ecb08d5 100644
--- a/lua/autorun/server/menus/sv_infect_menu.lua
+++ b/lua/autorun/server/menus/sv_infect_menu.lua
@@ -1,6 +1,5 @@
 settings = include("../sv_settings.lua")
 config = include("../sv_config.lua")
-infect = include("../sv_infect.lua")
 
 util.AddNetworkString("get_diseases_name")
 util.AddNetworkString("get_players_data")
@@ -43,8 +42,19 @@ net.Receive("infect", function (len, ply)
     local data = net.ReadTable()
     for _, infected in ipairs(data.infecteds)
     do
-        print("1")
-        infect(infected, data.diseases)
+        for _, disease_name in ipairs(data.diseases)
+        do
+            print(disease_name)
+            disease = settings.getDiseaseByName(disease_name)
+            if (disease == nil)
+            then
+                print(ply:GetName() .. " try to add undifined disease")
+            else
+                print()
+                disease:infect(infected, 1)
+            end
+            print("bozogang")
+        end
     end
 end)
 
diff --git a/lua/autorun/server/sv_disease.lua b/lua/autorun/server/sv_disease.lua
index 06c5f95..ab08f2f 100644
--- a/lua/autorun/server/sv_disease.lua
+++ b/lua/autorun/server/sv_disease.lua
@@ -1,3 +1,4 @@
+config = include("sv_config.lua")
 Disease = {}
 
 --- Disease class
@@ -17,4 +18,45 @@ function Disease:new(name, symbtoms_by_stages, contamination_methods, transmissi
     return instance
 end
 
+local function get_disease(diseases, to_find)
+    PrintTable(diseases)
+    for _, disease in ipairs(diseases)
+    do
+        print(disease.name .. " == " .. to_find)
+        if disease.name == to_find
+        then
+            return disease
+        end
+    end
+    return nil
+end
+
+---@param side infected number? the steam id 64 of player infected
+---@param side stage number? the the stage of the disease
+function Disease:infect(infected, stage)
+
+    if (stage == nil)
+    then
+        stage = 1
+    end
+
+    local file_path = config.save_path .. infected .. ".json"
+
+    local disease = {}
+    disease.name = self.name
+    disease.stage = stage
+    disease.contamination_time = 0
+
+    local data = util.JSONToTable(file.Read(file_path))
+    prev_disease = get_disease(data.diseases, self.name)
+    if prev_disease != nil 
+    then
+        if (prev_disease.stage >= stage) then return end
+        prev_disease = disease
+    else
+        table.insert(data.diseases, disease)   
+    end
+    file.Write(file_path, util.TableToJSON(data, true))
+end
+print("bozo")
 return Disease
\ No newline at end of file
diff --git a/lua/autorun/server/sv_infect.lua b/lua/autorun/server/sv_infect.lua
deleted file mode 100644
index edd85ed..0000000
--- a/lua/autorun/server/sv_infect.lua
+++ /dev/null
@@ -1,20 +0,0 @@
-config = include("sv_config.lua")
-
----@param side infected number? the steam id 64 of player infected
----@param side diseases table? a table of diseases
-function infect(infected, diseases)
-    local file_path = config.save_path .. infected .. ".json"
-    local diseases_stages = {}
-    for _, disease_name in ipairs(diseases)
-    do
-        local disease_stage = {}
-        disease_stage.disease = disease_name
-        disease_stage.stage = 1
-        table.insert(diseases_stages, disease_stage)
-    end 
-    local data = util.JSONToTable(file.Read(file_path))
-    table.Add(data.diseases, diseases_stages)
-    file.Write(file_path, util.TableToJSON(data, true))
-end
-
-return infect
\ No newline at end of file
diff --git a/lua/autorun/server/sv_init.lua b/lua/autorun/server/sv_init.lua
index 68b9983..6404365 100644
--- a/lua/autorun/server/sv_init.lua
+++ b/lua/autorun/server/sv_init.lua
@@ -1,3 +1,4 @@
 include("menus/sv_infect_menu.lua")
+include("sv_disease.lua")
 include("sv_saves.lua")
 include("sv_settings.lua")
diff --git a/lua/autorun/server/sv_saves.lua b/lua/autorun/server/sv_saves.lua
index b4a36bb..4f663d9 100644
--- a/lua/autorun/server/sv_saves.lua
+++ b/lua/autorun/server/sv_saves.lua
@@ -1,5 +1,6 @@
 utils = include("sv_utils.lua")
 config = include("sv_config.lua")
+settings = include("sv_settings.lua")
 
 utils.path_create(config.save_path .. "/ss")
 
diff --git a/lua/autorun/server/sv_settings.lua b/lua/autorun/server/sv_settings.lua
index 502c479..958079f 100644
--- a/lua/autorun/server/sv_settings.lua
+++ b/lua/autorun/server/sv_settings.lua
@@ -143,4 +143,16 @@ end
 
 print("[OK] settings")
 
+---name string? the name of the disease
+function settings.getDiseaseByName(name)
+    for _, disease in ipairs(settings.diseases)
+    do
+        if disease.name == name
+        then
+            return disease
+        end
+    end
+    return nil
+end
+
 return settings
\ No newline at end of file