 In this work we use a combination of statistical physics and dynamical systems approaches , to analyze the  response to an antigen  of a simplified model of the adaptive immune system, which comprises B, T helper and T regulatory lymphocytes.
<meaning-changed>  In this work we use a combination of statistical physics and dynamical systems approaches , to analyze the  response to an antigen  of a simplified model of the adaptive immune system, which comprises B, T helper and T regulatory lymphocytes.
 In this work we use a combination of statistical physics and dynamical systems approaches , to analyze the time-dependent response to an antigen of a simplified model of the adaptive immune system, which comprises B, T helper and T regulatory lymphocytes.