Looking for Twins for Medical Research

I met a lovely neighbour yesterday and it turned out she is a twin. She started telling me about some medical research she is a part of as a result. Apparently they are always looking for new twins to work with to expand their study.

 My neighbour said apparently you get excellent medical care, as they are tracking a lot of medical indicators in the twin pairs. In fact she had just been told her DNA was bring used as part of the Covid research to identify a vaccine.

 If anyone is, or knows of anyone who is, a twin this sounds like the sort of really important medical research that you might want to be a part of.