Question

Read the following paragraph from the section "What Is A Vaccine And How Does It Create Immunity?" What conclusion is BEST supported by the paragraph above?

A) Many people get the chicken pox but do not recover.
B) It takes a long time to develop vaccines that create immunity.
C) Fewer people get sick with the chicken pox now than in the past.
D) There are some diseases for which scientists have not yet developed a vaccine.

Answer 1

The best-supported conclusion from the provided paragraph is that there are still some diseases, such as Ebola, for which vaccines have not been developed. Vaccines are critical for establishing immunity, but not every infectious disease can currently be prevented by vaccination.

Step-by-step explanation:

The best conclusion supported by the paragraph provided is D) There are some diseases for which scientists have not yet developed a vaccine. Vaccines work by introducing a weakened, dead, or partial pathogen into the body which initiates an adaptive immune response similar to natural infection without making the person sick. This leads to the development of memory cells that provide immunity against future infections. However, not all diseases currently have a vaccine; a notable example mentioned in the paragraph is the disease caused by the Ebola virus, highlighting that despite advances in immunology, there are still challenges to be addressed.