The most effective time to begin influencing a child not to smoke is?

The most effective time to begin influencing a child not to smoke is during early childhood, ideally before they reach adolescence. At this stage, children are highly impressionable and can absorb positive messages about health and lifestyle choices. Engaging them in open conversations about the dangers of smoking and modeling healthy behaviors can establish a strong foundation against tobacco use. Additionally, reinforcing these messages as they grow can help them resist peer pressure in their teenage years.