Centenarians have protective genes

Scientists at the Albert Einstein College of Medicine of Yeshiva University have discovered favorable “longevity” genes that protect very old people from the effects of bad genes. People who live to a hundred have just as many if not more bad genes which cause disease as people who live shorter lives but they have genes to negate the effects. The novel method used by the researchers could lead to new drugs to protect against age-related diseases.

Looking at the SENS model

Damage from the bad genes is occurring but is blocked or reduced by the good genes. I would think that this is mostly gerontology effects of minimizing the accumulated damage.