Hi,
What question do you want your project to answer? You can see that the steps in using the scientific method starts with a question that you will answer with you science fair project. This is explained here:
https://www.sciencebuddies.org/science- ... fic-method
For the How Far Can Your Sneeze Go activity,
https://www.sciencebuddies.org/stem-act ... xploremore
You can simulate a sneeze by using a spray bottle and observing where the droplets land.
The project also includes :
"For Further Exploration
What happens if you sneeze "harder" by squeezing the bottle's handle faster?
How do your results change if you change the height of the bottle above the ground? Try standing up and holding it at face level.
What happens if you do the experiment in a room with air currents? Try opening some windows or turning on a fan."
This experiment will show how properly washing your hands can help prevent spread the germs (that you may have blocked from your sneeze)
https://www.sciencebuddies.org/science- ... #procedure
Once you decide on the question that you want the science fair project to answer, we can assist you with coming up with project ideas.
A project on vaccine and herd immunity can also be projects on their own. Here is great information on the background for these topics.
https://www.sciencebuddies.org/science- ... ?s=vaccine
A way to combine these ideas is to think of a question that you are interested in finding an answer for. Here are some questions that you can build a project for. These specific examples would entail three separate projects.
"Can covering your sneeze still spread germs?"
"How do vaccines help prevent the spread of a viral outbreak?"
"Does herd immunity work?"
Can you think of a question that would combine all of the topics you are interested in exploring? Once you decide on the question that you would like to answer, we can better assist and guide you with your science fair project.