Only destroy one instatnce

Hi, I'm having a problem where all of the game objects with the health script get destroyed, not just one specific instance. I know why this has happened, but don't have a solution. If I'm correct it's because the scripts changes a value for all instances that it's attached to.

The health script:

 using UnityEngine;
 using System.Collections;
 
 public class health : MonoBehaviour {
 
     public float maxHealth;
     public float minHealth;
     static float currentHeath;
 
     void Start() {
         currentHeath = maxHealth;
     }
 
     void Update() {
         if (currentHeath < minHealth) {
             Destroy(this.gameObject);
         }
     }
 
     public void takeDamage(float Damage) {
         currentHeath = currentHeath - Damage;
     }
 
 }