camera shake when player takes damage

player.cs

private CameraShake _playerShake;

void Start()
{
_playerShake = GameObject.Find("Camera").GetComponent<CameraShake>();
}

 public void Damage()
    {

        

        switch (_isShieldActive)
        {
            case true:


                _shieldLife--;
                if (_shieldLife == 2) 
                {
                    _shieldDamage.color = Color.magenta;
                }
                else if(_shieldLife == 1)
                {
                    _shieldDamage.color = Color.red;
                }
                else { 
                _isShieldActive = false;
                _shield.SetActive(false);
                _shieldDamage.color = Color.white;
                _shieldLife = 3;
                }
                break;

            case false:
                _lives--;
                _playerShake.ActivateShake();
                _uiManager.UpdateLives(_lives);
                break;               
                

        }
 }