We live in what was considered the first “hotspot” in the country, East King County in Washington State. We have half a million recent Chinese immigrants living here as neighbors, many of whom went home to China last Chinese New Year. A lot of people were sick here before we even knew what it was.
The unusual thing about your story is that you say all 7 people developed symptoms. On the fire department that I worked for last March a firefighter developed symptoms that he thought were from his hay fever but he tested positive. Everyone on the department was then tested, 9 more people tested positive. None of them had symptoms, none of them developed symptoms. All of them tested negative a couple weeks later. Only one person developed symptoms and they did not go away after he tested negative... they were from his hay fever.
That is not unusual. The vast majority of people under the age of 50 who do not have any "comrbidity" develop symptoms. I have several family members who have tested positive, none of them had anything more than minor symptoms. My wife and I had flu symptoms last February... might have been covid, might have been the flu. That is the nature of this bug. Were all the people in the family you speak of over 50?
But these people are all sick....in fact concern over taking care of the mother, (who is 91 might need hospitalization)...as they’re all ‘sick’ with this.