versions.md

@@ -5,7 +5,7 @@ This document gives a short description of available versions of wormsim.
 ## 1. Version 4.0
 
 This is the present, most recent version. This version is completely rewritten and redesigned. The first version is published on december 7, 2017. 
-Remember that this version is an intermediate version, which is not yet optimized. 
+Note that this version is an intermediate version, which is not yet optimized, and which has several features not yet implemented. It has all disease processes except immunity, but doesn't have any treatment. 
 
 ### 1.1. Main differences in comparison to older versions.