Understanding Vaccines

Vaccines are injections that protect against diseases, ranging from mild to deadly. They are derived from the viruses or bacteria that cause the disease, treated in labs to create a medicine that alerts the immune system. This process, called immunity, helps the body recognize and fight harmful agents. Vaccines are crucial in preventing diseases like smallpox, measles, and polio, which have historically affected human health significantly.

What is the primary purpose of a vaccine?

• To protect against diseases

• To replace the immune system

• To cause diseases

• To make people immune to all viruses

How do vaccines help the immune system?

• By making the immune system inactive

• By weakening the immune system

• By introducing new diseases

• By alerting the immune system to harmful agents

What is the process called when the immune system is activated by a vaccine?

• Infection

• Vaccination

• Immunity

• Contamination

Which of the following diseases have vaccines helped to combat historically?

• Allergies

• Smallpox

• Common cold

• Headache

What role have vaccines played in human history?

• They have significantly improved health

• They have been ineffective

• They have caused more diseases

• They have been unnecessary

Which of the following is NOT a disease mentioned in the video that vaccines have helped prevent?

• Chickenpox

• Polio

• Smallpox

• Measles