Why do vaccinated people still get sick? Ask Paste BN

While many people may think vaccines are 100% effective at staving off disease, basic math tells us that they are not.

The measles vaccine, for example, is one of the most effective at 93% (for those who have had only one dose of the vaccine) and 97% (for those who have had two doses, which is the recommended amount). Why?

Take a look at the video below for more details about vaccine effectiveness from technology reporter Elizabeth Weise as she breaks down the numbers in her answer to this reader question.

Have a question of your own? Send it to us using #askusatoday on Twitter. You can also post your question on the Paste BN Opinion Facebook page, or e-mail it to us using askusatoday@usatoday.com.

Why do people who have been vaccinated still get sick? Ask Paste BN

Technology reporter Elizabeth Weise breaks down the numbers when it comes to vaccine effectiveness in her answer to this reader question. Take a look, then send yours using #askusatoday on Twitter.