Nation

Thousands of young US children get no vaccines, survey finds

NEW YORK — A small but growing proportion of the youngest children in the United States have not been vaccinated against any disease, worrying health officials.

An estimated 100,000 young children have not had a vaccination against any of the 14 diseases for which shots are recommended, according to a Centers for Disease Control and Prevention report released Thursday.

‘‘This is pretty concerning. It’s something we need to understand better — and reduce,’’ the CDC’s Amanda Cohn said.

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Most young children — 70 percent — have had all their shots. The new estimate is based on finding that, in 2017, 1.3 percent of the children born in 2015 were completely unvaccinated. That’s up from the 0.9 percent seen in an earlier similar assessment of the children born in 2011. A 2001 survey with a different methodology suggested the proportion was in the neighborhood of 0.3 percent.

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Young children are especially vulnerable to complications from vaccine-preventable diseases, some of which can be fatal.

The latest numbers come from a telephone survey last year of the parents of about 15,000 toddlers. The 100,000 estimate refers to the 2017 vaccination status of kids born in 2015 and 2016.

A separate CDC study found that overall vaccination rates for older, kindergarten-age children continue to hold about steady, with close to 95 percent fully vaccinated.

The researchers didn’t ask why parents didn’t get their kids vaccinated.

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