Plenty of assessment errors occur via other forms of health research, self-diagnosis, and professional diagnosis, too. That's why the more serious a result is,

Plenty of assessment errors occur via other forms of health research, self-diagnosis, and professional diagnosis, too. That's why the more serious a result is, the more it should be examined and re-checked. This incident seems to me like a big win for the 23andme model. They made an error – but followup by a single individual means the same error won't happen again for anyone in their international clientele. Errors in other health systems don't get globally corrected so quickly.