199k views
2 votes
Explain the reason there are still some cases of polio in the United States.

User Kinexus
by
7.7k points

1 Answer

5 votes

1). The vaccine is not 100% effective.

2). There are still people who don't allow their children to be vaccinated. (They don't understand why this is child abuse.)


User Patryk Kordylewski
by
7.9k points

No related questions found