Brooo you're overcooking the egg It's very simple You all have above nominal immune systems. Anything above the halfway point in regards to the global or national average basically places you in a category where your chances of getting a some level of Covid in your body, and your immune system cleaning it out without you even noticing??? VERY likely. Have you noticed any days this past few months when you randomly got tired one night? Maybe a few hours on me day you felt sniffly it a bit off for a few hours? That was your body going all Iwo Jima on what they found and stopping it before it could cascade into a full blown infection. Or something like that