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![](https://static.time.com/v3/assets/bltea6093859af6183b/blt919a264fff2f7b15/69894543096a9407506a4946/gettyimages-76024284.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9)


# Yes, Vaccines Really Are Safe and Effective. Here's Why

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![Jeffrey Kluger](https://static.time.com/v3/assets/bltea6093859af6183b/blt8ba5798889b0f77d/69868efb1eebf78937370d95/jeffrey-kluger.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1:1)

by 

[Jeffrey Kluger](https://time.com/author/jeffrey-kluger/)


![Jeffrey Kluger](https://static.time.com/v3/assets/bltea6093859af6183b/blt8ba5798889b0f77d/69868efb1eebf78937370d95/jeffrey-kluger.jpg?branch=production&width=96&quality=75&auto=webp)

## Jeffrey Kluger


Editor at Large

Feb 15, 2019 8:26 PM UTC

![Miami-Dade County Gives Child Immunizations Before School Begins](https://static.time.com/v3/assets/bltea6093859af6183b/blt919a264fff2f7b15/69894543096a9407506a4946/gettyimages-76024284.jpg?branch=production&width=1200&quality=75&auto=webp&crop=3:2)

HIALEAH, FL - AUGUST 08: Barbara Dale, a school nurse, prepares an immunization needle for a child August 8, 2007 in Hialeah, Florida. The free immunization is part of the Miami-Dade County Health Department's program to help children heading back to school. (Photo by Joe Raedle/Getty Images)

HIALEAH, FL - AUGUST 08: Barbara Dale, a school nurse, prepares an immunization needle for a child August 8, 2007 in Hialeah, Florida. The free immunization is part of the Miami-Dade County Health Department's program to help children heading back to school. (Photo by Joe Raedle/Getty Images) Joe Raedle—Getty Images

![Jeffrey Kluger](https://static.time.com/v3/assets/bltea6093859af6183b/blt8ba5798889b0f77d/69868efb1eebf78937370d95/jeffrey-kluger.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1:1)

by 

[Jeffrey Kluger](https://time.com/author/jeffrey-kluger/)


![Jeffrey Kluger](https://static.time.com/v3/assets/bltea6093859af6183b/blt8ba5798889b0f77d/69868efb1eebf78937370d95/jeffrey-kluger.jpg?branch=production&width=96&quality=75&auto=webp)

## Jeffrey Kluger


Editor at Large

Feb 15, 2019 8:26 PM UTC

Yet another outbreak of a vaccine-preventable disease — this time [measles in the Pacific Northwest](http://time.com/5524505/measles-washington-vaccination/) — provides another reminder of the importance of getting children fully vaccinated, on schedule. Anti-vax or vaccine-skeptical parents are certainly not acting out of malevolence. They’re doing what they believe will protect their children’s health. But the fact is they’re achieving the opposite — potentially endangering their health. Those are the facts. Watch the video with TIME’s Editor-at-Large Jeffrey Kluger above to learn why.

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