All 50 of the folks in your office sit within 20 ft of each other, are unvaccinated and don't wear masks or just the 4 of you who got COVID? Not sure what the big deal is since this well outside the CDC 6' safe distancing recommendation.
This was February 2020, before anything changed. The 4 of us worked in the same department and spent most of the day talking to each other. I shared an office with one of them.
It was your typical office setting, people in cubes and offices, many people were 2 to an office space. Impossible to walk down the hallway without getting within 6-feet of over a dozen people, just due to the office layout. Standing around people near the printer. Getting coffee with 6 people within 5 feet of you.
Break room was across from my office. All 4 of us who got it had sat in the break room with up to 10-12 people every day for lunch. We would sit in peoples offices and go over marketing materials face to face, yet only 4 of us got sick. Maybe they got it to but didn't have symptoms?
Only 2 of us took time off and stayed home. The other two were in the office acting completely normal. Face to face meetings, going to lunch together, etc.
The first guy who got sick must had gotten it from his cousin who had just returned from Seattle who was living with him for a few months. This is before Covid really had taken off in America. He said he remembered his cousin being sick when he got back, but didn't think much of it. Just a cold or something.
Once we heard the Covid outbreak and talked about it, we all got tested for antibodies and all 4 of us had them.