When inviting someone to share, you can choose between two levels as described below:
Sharing, without health reports:
- Compare your ancestries with Ancestry Composition, Maternal Line, Paternal Line, Global Similarity.
- Use Family Traits and Family Inheritance: Advanced to identify and measure your genetic similarities.
Sharing, with health reports:
- In addition to the capabilities above, compare your data in most Health and Traits topics.
You will not, in either level, be able to search or download the other person's raw data.
What should I consider before sharing at 23andMe?
You would directly be sharing information about ancestral origins, family relationships and, if you've chosen that option, health risks. Some people are very comfortable sharing this kind of information, some are not -- it's a personal choice.
Some features like Family Traits, allow you to compare DNA between two people you're sharing with. Similarly, your shares may compare your DNA with that of people they're sharing with. For example, if you and Adam both share with Bob, Bob may run comparisons between you and Adam. This aspect of sharing allows customers to compare people to each other and opens up new genealogical vistas by allowing customers to find evidence of family relationships. However, for some these new-found family relationships could be upsetting.
- There is some chance that someone you're sharing with could learn something about you that you didn't directly share. For example, if you and someone you're sharing with have a matching segment of DNA that overlaps a health-associated gene, you might infer something about their genotype on the basis of your own, or vice versa. While it's important that we mention this possibility, in practice it requires effort to make inferences like this, and it doesn't happen very often.
If you're unsure about all this, we recommend sharing with people you're comfortable with. Sharing allows you to use more of the features on the website and adds a new dimension to what you can learn about yourself and your family. Many customers share openly with each other and have benefited from the experience. As you learn more about genetics and develop a finer sense of the issues involved, you might begin to share more openly yourself.
Additional Notes on Sharing
You may not see data for an individual with whom you are sharing if that individual's data have not yet been loaded to their account. Even though you can't see his or her information, he or she will be able to see yours. Once his or her data arrive you will be able to view it.