Tracy suffered from chicken pox in her childhood. at the age of 25, she gets it again. however this time she recovers with minimal treatment and medication. this was possible due to

It was like memory t- cells which basically are the brains of the immune system,this way if a disease strikes,the next time it strikes the immune system knows what to do and what to protect like vital organs a virus may attack

answer: our bodies are made up of mostly water, we rely on it to regulate our body funtions.

idk im very sorry i wish i could you