Describe three specific aspects of vaccine technology and how they have helped prevent the flu.

• Vaccines have reduced flue-associated hospitalization for kids.

Flu vaccines have reduced risk of infection in babies after birth.

Flu vaccines have reduced cardiac events in people with heart disease.

Explanation:

Flu vaccines have helped the body to develop natural defence that aid in making the body immune to the disease.Flu vaccination has reduced the number of patients hospitalized due to the disease.In addition to that,it has been observed in people with heart disease that flu vaccines reduce their risk of cardiac attack events.Flu vaccination has cut down respiratory risks in pregnant women and protected the babies after birth from flu

answer(b) keep oxygenated and deoxygenated blood separate;