will damage the immune system and when this happens, one become vulnerable to illness often referred to as 15S+ORTANSWER=oppotunistic infections that a healthy immune system would usually be able to fight off, and this leads to a condition known as(1:5HORTANSWER-AIDS] Answer: square

The correct answer is: opportunistic infections.<br /><br />When the immune system is damaged, it becomes vulnerable to opportunistic infections. These are infections that a healthy immune system would usually be able to fight off. When the immune system is weakened, these opportunistic infections can take hold and lead to a condition known as Acquired Immunodeficiency Syndrome (AIDS).