Is it ok to have 1-2 cigarettes every 2 weeks?

I started smoking 5-6 years ago, since then I quit twice, the first time for 6 months, the second time for over 2 months. I'm trying again, this time I've been smoke free for about 4 weeks then I smoked for one day and started over, well now I did it again... So I'm starting over. My point is, is it still bad to have a few cigarettes once in a while?