Question

Vaccination can prevent the cause of several

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Answer 1

Answer:

Vaccination helps prevent the spread of disease in communities. When a large percentage of a population is vaccinated, infectious diseases cannot easily spread. This is known as 'community immunity' (also referred to as 'herd immunity'). Vaccination can eliminate diseases or reduce the number of new cases significantly.

Thanks to vaccination:

smallpox is now eradicated worldwide;

transmission of polio has ended in most parts of the world, including Europe.

Vaccination also prevents the development of certain types of pre-cancerous growths and cancers, for example:

vaccinating against humanpapilloma virus (HPV) can help prevent cervical and other cancers caused by HPV infection;

vaccinating against hepatitis B can help prevent liver cancer caused by long-term hepatitis B infection.

Vaccination programmes have wider societal benefits. They help reduce the social, psychological and financial burdens of disease on people and governments, reducing pressures on healthcare and social care systems and enabling people to pursue productive activities including education and employment.

Vaccination is the best way to acquire immunity against vaccine-preventable diseases, as opposed to immunity attained by getting the disease. Vaccination prevents people from getting the symptoms of the disease, which can be severe.

Explanation:

Answer 2

Vaccines prevent disease in the people who receive them and protect those who come into contact with unvaccinated individuals. Vaccines help prevent infectious diseases and save lives. Vaccines are responsible for the control of many infectious diseases that were once common in this country, including polio, measles, diphtheria, pertussis (whooping cough), rubella (German measles), mumps, tetanus, and Haemophilus influenzae type b (Hib).

Vaccine-preventable diseases have a costly impact, resulting in doctor’s visits, hospitalizations, and premature deaths. Sick children can also cause parents to lose time from work.

Each child is born with a full immune system composed of cells, glands, organs, and fluids that are located throughout his or her body to fight invading bacteria and viruses. The immune system recognizes germs that enter the body as “foreign” invaders, or antigens, and produces protein substances called antibodies to fight them. A normal, healthy immune system has the ability to produce millions of these antibodies to defend against thousands of attacks every day, doing it so naturally that people are not even aware they are being attacked and defended so often (Whitney, 1990). Many antibodies disappear once they have destroyed the invading antigens, but the cells involved in antibody production remain and become “memory cells.” Memory cells remember the original antigen and then defend against it when the antigen attempts to re-infect a person, even after many decades. This protection is called immunity.

Vaccines contain the same antigens or parts of antigens that cause diseases, but the antigens in vaccines are either killed or greatly weakened. When they are injected into fatty tissue or muscle, vaccine antigens are not strong enough to produce the symptoms and signs of the disease but are strong enough for the immune system to produce antibodies against them (Tortora and Anagnostakos, 1981). The memory cells that remain prevent re-infection when they encounter that disease in the future. Thus, through vaccination, children develop immunity without suffering from the actual diseases that vaccines prevent.

Source: Centers for Disease Control and Prevention

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