Answer:
The ability of Immune system is decreased by stress hormone.
Step-by-step explanation:
When we are stressed in our life, our immune system's ability to fight against harmful microbes is decreased. Due to this decrease in the ability of immune system, we are more susceptible to infections of harmful microbes such as virus and bacteria. The corticosteroid hormone which is in stress condition can adversely affect the effectiveness of the immune system means lowers the number of white blood cells and our body can't fight against infection efficiently.