Is it true that when we inhale the smell of compost, it builds our immunity? What's the logic behind case?

Is it true that when we inhale the smell of compost, it builds our imm

1.	Is it true that when we inhale the smell of compost, it builds our immunity? What's the logic behind case?
Answer» Is it true that when we inhale the smell of compost, it builds our immunity? What's the logic behind case?