223k views
5 votes
Vaccines were developed to provide immunity to a viral infection. Which of the following is a likely hypothesis of why the smallpox vaccine is no longer given?

User Ashkru
by
7.6k points

1 Answer

1 vote
People have grown completely immune to smallpox, meaning that the vaccine has done it's job and is no longer needed.
User Adi Tiwari
by
7.5k points