OK, I hear you.

So we're talking about hints - is Anna immortal? or just very long-lived?

Assuming the weaker choice still leads to millions of HUMANS dying from the possible cures to the diseases her cohort had.

The postdoc was clearly working on curing a range of inflammatory diseases and working against age related infirmities in HUMANS based on a unified theory:

> this was clearly the work of many years. It described a theory of cellular inflammation and metabolism, “apoptosis” and DNA repair, a theory of aging, that in the author’s own telling would have extraordinary consequences if true.

When the experiment "failed" the postdoc not only stopped her own investigations, but discouraged others:

> The last and longest-running of the experiments, she wrote, had been catastrophic: the subjects had all died. The rest of the paper proceeded from that fact. Becker eviscerated her own theory. In the conclusion she practically apologized. She deemed the whole line of thinking a scientific dead end.