Review: Vaccines how they work

What is a vaccine?

A vaccine is a biological preparation that provides immunity to a particular disease by stimulating the immune system.

How do vaccines work?

Vaccines expose the immune system to a harmless form of the pathogen, allowing it to recognize and fight the real pathogen in the future.

True or false: Vaccines contain live viruses.

False, because many vaccines use inactivated or weakened pathogens.

Difference between active and passive immunity.

Active immunity occurs when the body produces antibodies, while passive immunity is when antibodies are transferred from another source.

Fill in the blank: Vaccines are usually given through _______.

injections, nasal sprays, or oral doses.

What is herd immunity?

Herd immunity occurs when a significant portion of a population becomes immune, reducing the spread of disease.

True or false: All vaccines require booster shots.

False, because some vaccines provide lifelong immunity after a single dose.

What are adjuvants?

Adjuvants are substances added to vaccines to enhance the immune response.

Question: What is the purpose of a vaccine?

To prepare the immune system to fight off specific pathogens in the future.

Difference between inactivated and live attenuated vaccines.

Inactivated vaccines use killed pathogens, while live attenuated vaccines use weakened forms.

How long does immunity from a vaccine typically last?

Immunity duration varies; some last for years, others may require boosters.

True or false: Vaccines can cause the disease they protect against.

False, because vaccines contain weakened or inactivated forms of pathogens.

What is a vaccination schedule?

A vaccination schedule outlines when vaccines should be administered for the best protection.

Question: Who sets vaccination guidelines?

The Centers for Disease Control and Prevention (CDC) establishes vaccination guidelines in the U.S.

What are common side effects of vaccines?

Common side effects include soreness at the injection site, fever, or mild fatigue.

Fill in the blank: Vaccines can be made from _______.

proteins, sugars, or even genetic material (mRNA).

What role do memory cells play in immunity?

Memory cells help the immune system recognize pathogens quickly during future exposures.

Question: What is the role of the immune system?

To identify and eliminate pathogens such as bacteria and viruses.