Recent research suggest that completely healthy seniors may be at risk of developing cancer due to cellular mutation. This study found that by age 60, 100 billion cells in a person's body have at least one cancer causing mutation. By performing a meta-analysis of previously public sequencing data on normal tissues, the researcher were able to categorize the mutations that occur in a senior citizens body. Despite the grim statistics, the vast majority of these mutations found, have no effect on the body, and most people will go their entire lives without a cancer diagnosis. As such, these findings should not elicit panic for older people, but should shed light on the fact that these mutations should be further studied.