This is how science should be done, including "non-existence" of viruses

Young's Double Slit Experiment Part 3 - The Detector
https://www.youtube.com/watch?v=8KhUA66GoS4

Interference Experiment with a Transparent Mask Rejects Wave Models of Light
https://www.scirp.org/journal/paperinformation.aspx?paperid=93056

The result is caused by the presence and the mutual effect of all the individual components involved in the experiment and each single component can influence the course of the experiment on a different level, while all the components simultaneously function and act as a whole.
Omitting, suppression or simplification of any of the components involved creates illusion.