This enemy is in the earliest stage of the fungal infection and still have their vision, they tend to hunt in groups so it is advised to stay out of their sight. If you do get captured press R2 to break free and run to safety. All types of attacks (Ranged, Melee or Stealth) are effective against this enemy.
A good strategy to get past an infected Clicker is to make a noise or throw a brick or a bottle to distract them. If you do find yourself in ranged combat you will need at least two head shots to take it down.