Which body system's main function is to fight infection and disease

"follow hollywood's hottest diet craze to use more calories and feel great" this article most likely a) provides an easy-to-follow nutrition plan b) includes recommendations that are unsafe c) gives expert advice on creating a healthy lifestyle d) sets a realistic goal for health and weight loss

How harmful is it to smoke a pack of cigarettes a week?

per vehicle mile, motorcyclists are times more likely to die in a crash than passenger car occupants.