There's no easy answer to that since we all have a different level of risk for cancer. If there is a history of cancer in your family, it's conceivable that two or three cigars per week could do you harm, although chances are sitting in traffic breathing the carcinogens of a freeway full of SUV's would be far more likely to contribute to that cancer than a couple cigars a week. Overall, I think most of us cigar smokers have alot more things to worry about than the risk of cancer from our stogies. Heavier smokers like me probably have more to worry about, but I'm still not likely to give it too much thought anytime soon.