Vaccines are crucial in protecting against viral infections by teaching the immune system to recognize and combat viruses. They work by introducing a harmless part of the virus to trigger an immune response. However, not all viruses have vaccines, and scientists are continually researching to develop new ones for various virus types.

What is the primary role of vaccines in combating viral infections?

• To provide immediate immunity against all viruses

• To replace the immune system

• To teach the body to recognize and fight viruses

• To eliminate viruses from the body

How do vaccines trigger an immune response?

• By increasing body temperature

• By using antibiotics

• By introducing a small, harmless part of the virus

• By introducing a live virus into the body

What happens when the body encounters the virus again after vaccination?

• The body ignores the virus

• The body recognizes and fights the virus

• The body becomes weaker

• The virus becomes stronger

Why are not all viruses preventable by vaccines?

• Because viruses are not dangerous

• Because not all viruses have vaccines developed yet

• Because some viruses are too small

• Because vaccines are ineffective

What is the focus of scientists in the field of vaccines?

• To reduce the number of vaccines available

• To stop all vaccine production

• To develop new vaccines for different types of viruses

• To make vaccines more expensive