False negatives

 A study of the accuracy of self collected samples in patients known to have SARS-CoV-2 has now been published indicating that self-testing has a sensitivity rate 75% (against 82.8% when taken by a health care worker); a false negative rate of 25%

My test came back negative.  But my husband's was positive.  I think it's pretty safe to assume I have it, and I'm going to stay away from my friends for the usual period.

I wonder how much spread is caused by people who assume they are okay after a negative test?