The increasing penetration of distributed energy resources in power networks is a key focus of current research, with a particular emphasis on the implementation of Inverter-Based Resources (IBRs). These IBRs are gaining prominence due to their ability to operate on isolated grids (microgrids) or as integrated units in larger power networks. Historically, the stability of power grids has relied on conventional synchronous generators. The integration of IBRs introduces a range of challenges, including voltage instability, frequency instability, rotor angle instability, a lack of spinning reserves, and complex dispatch strategies. To address these challenges, dynamic modelling has become an essential tool in the operation and monitoring of modern power systems. This paper focuses on control of grid forming IBR using Immune System Response analogy for smooth operation. This paper utilizes virtual synchronous generator (VSG) configuration of GFM. In VSG, power synchronization control open-loop transfer function is utilized. The proposed Artificial Immune Response (AIR) is used to provide and enhance synthetic damping of VSG. Thus, improving dynamic response of the system. The proposed AIR based synthetic damping is simulated in MATLAB and results obtained show suitability of AIR in IBR control.