The answer is True its mentioned that in 1999 they used it as a technique
No ————————————〜〜〜〜〜〜〜〜〜〜〜
Some bacteria can fight other harmful bacteria’s and some bacteria’s are harmful to the body.
I balanced life is doing a good job in school and putting in a good amount of work and time into school. Also, making sure you get a good amount of fitness and exercise to stay healthy.