What age group does food poisoning mostly affect?

Food Poisoning. Food poisoning can occur at anytime, any age, and any foods are susceptible. From water, salad, meats, and carbs, all food have potential for causing food poisoning. Throw in x-contamination and it's inevitable everyone will be affected at some point in their lives. Those that have weakened immune systems are always at greater risk.
Very young and old. The transmission of infectious agents is more likely to affect people with impaired immune systems. This would include the very young and the very old.