How long could a person possibly live?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
  
  

Sister Andre, a French nun, who was 116 years old at the time of this photo in February 2021.
Sister Andre, a French nun, who was 116 years old at the time of this photo in February 2021. Photograph: David Tavella/AP

If someone managed to, hypothetically, avoid pollution, never be involved in an accident and followed all health advice to the letter, how long would they live for? Jane Shaw

Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.

 

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