Tracking the Disease- Science

In science, we conducted an experiment to show how diseases spread. Each student had a beaker of lab made saliva. We went to a part of the room of our choice, and added a bit of our saliva to someone else's. They did the same to us. We went back to our table after 3 rotations, and added a disease indicator to our saliva. If it turned purple, it meant we had been infected on that day. I got infected on Day 2.
On Day 0, four people were infected, which was approximately 19% of the class. On Day 1, 11 people were infected, around 52%. 17 people were infected on Day 2, which was about 81%, and on Day 3 21 people or 100% of the class was infected. The graph above shows the number of people infected on each day in blue. It shows the percentage of people infected with the red line. Here are some questions we had to answer.
1. If you were trying to avoid catching a disease, what could you do?
I would wear a mask or other disease protection, because I know that in reality we don't share saliva with people, but we touch them. Using this protection can stop these diseases from spreading from person to person.
2. Imagine you are the health director of a health department in the town where the disease is spreading. It is your job to prevent people from getting sick. Explain what you would recommend to try to prevent people from getting infected.
I would recommend that people wear disease protection, and stay clean by washing their hands often. This is because soap can disinfect our skin when it is dirty/infected.

To see more of my graph, and another graph I made, click this link: https://docs.google.com/spreadsheets/d/1nVj1HWWDXNtGstZJJLfB0RMx43mOuxApzKY_OneFugw/pubhtml