The best ways to avoid getting sick is boosting your immune system. There are so many reasons for getting sick. We can't remove all the reasons. We have to live with various causes. It means that when bad viruses get into our bodies, if our immune system kills the viruses notting happens. There are ways to boost our immune system. First, do excrise. Second, reduce taking antibiotics. Our immune system naturally weakens, when we get older. So, we have to try for boosting it.

Excellent work, Hwanny! Thank you for being diligent with you home work. Keep going!