It appears most people get it in situations where masks are not being worn. Family gatherings, parties etc. Not in grocery stores or airplanes where everyone wears masks.

My brother just tested positive after a date with a woman who tested positive after their date. My brother subsequently us for our son's birthday and gave our mother a ride in his car. He tested positive two days later.

I have been travelling Europe for work throughout the pandemic including travelling by airline a lot. I've been to all the hot spots. I followed mask , distancing and hygiene protocols and had a negative antibody test last week. I may now have gotten it from my brother because of course we don't wear masks around the house with close family over for a child's birthday. Getting tested on Monday. We will see. I'm not worried about myself but am a bit worried about my mother.