during the pandemic of COVID-19. The chemical substance in the sanitizer can help you cleaning your hand easily without using water and soap. One of the reasons is that you will always use your hand to touch something and make contact with other people. During the interactions, virus can be transmitted, and applying the sanitizer on the palm of hand is safe way to kill the virus. Then, availability of water and soap sometimes cannot be obtained easily. It will also take time when you have to go to toilet to wash your hands. With hand sanitizer, you can easily clean your hands and avoid the threats of virus. In conclusion, it is highly recommended to always bring the sanitizer whenever you go. What is the main idea of the fourth paragraph ?​