Table 2. Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
• 18–60 years-old • Healthy and free of diseases (biochemical tests)	• Have some health-related problems • On treatment or medication • Currently taking vitamin E supplements • Smoker • Received influenza A and B vaccination in the last 12 months • Obese (BMI > 35 kg/m 2) • Pregnant and/or breast-feeding