In a large teaching hospital where I did some consulting work, a plurality of people at the hospital site were visitors (followed by staff, then patients). It is not surprising that hospitals feel empty when you remove most of the people in them.

thats true, i just kept meeting personal who told me otherwise, they weren't conspiracy theorist either, this was before all that started. i actually dated one nurse for a bit she was super bored at work half the time. not saying thats a bad thing, i just would watch tv, hear one thing and then experience something entirely different but you've been around it and saw something different so i just might have been there during weird times or something idk

Why and how were you at so many hospitals? Providing more context could explain what you experienced.

During an infection disease emergency you don't want random people at a hospital.

Hospitals aren't giant ICUs.