Quantum immortality is a speculative concept that arises from interpretations of quantum mechanics, but it is not widely accepted in the scientific community as a valid explanation of immortality. The idea suggests that an individual's consciousness could continue to exist in a parallel universe or branch of reality, even if they were to experience potentially fatal events in their own universe.
According to some interpretations of quantum mechanics, every possible outcome of a quantum event is realized in different branches of the multiverse. In the context of quantum immortality, it is suggested that an individual's consciousness could only exist in branches of the multiverse where they continue to survive or evade death.
However, it is important to note that this concept relies on several assumptions and speculative interpretations of quantum mechanics. It is not supported by experimental evidence or widely accepted by the scientific community. The prevailing view among physicists is that quantum mechanics describes the probabilistic behavior of microscopic particles, and its interpretations remain a subject of debate.
From a more scientific and empirical perspective, there is currently no scientific evidence to suggest that quantum immortality is real or that it applies to human consciousness. Our understanding of consciousness, mortality, and the nature of reality is still an active area of research and inquiry, and there is much that remains unknown.
For the time being, it is more reasonable to approach the concept of mortality from the perspective of our current understanding of biology and the limits of human life.