FDA study shows no real statistical risk from smoking 1-2 cigars per day. There is a more exhaustive link to this study but it eludes me.
https://www.rstreet.org/2016/08/24/f...igars-per-day/
In a nutshell, smoking 1-2 cigars per day shows no statistically relevant changes in cancer rates. A habit above that, the changes are small but consistent; single digit type percentage increases for those areas you'd expect, mouth/throat.
There are a lot of other variables that play in, including but not limited to: genetics, lifestyle choices like diet/exercise, exposure to other carcinogens at the workplace or home, etc. As with many things in life, moderation tempers most concerns.