<u><em>Answer:</em></u>
<u><em>An effective strategy may include: Choose aerobic activities such as walking. Exercise for at least 30 minutes on all or most days of the week. Cut back on junk food. Eat smaller food portions. Increase the amount of fresh fruits and vegetables, lean meats, low-fat dairy products and wholegrain foods in your daily diet .</em></u>
<u><em>Explanation:</em></u>
Answer: Public health measures such as pure food and water, and development of immunizations against many serious diseases such as polio and smallpox, coupled with enhanced economic conditions, are together credited with substantial reductions in the burden of infectious diseases.
