Answer:
Healthy ways to strengthen your immune system
- Don't smoke.
 - Eat a diet high in fruits and vegetables.
 - Exercise regularly.
 - Maintain a healthy weight.
 - If you drink alcohol, drink only in moderation.
 - Get adequate sleep.
 - Take steps to avoid infection, such as washing your hands frequently and cooking meats thoroughly.
 - Fermented foods
 
Hope this helps :)