Most American infants are getting the vaccinations they need to protect them from serious diseases.

A New CDC report says more than 90 percent are getting their shots for measles, mumps, and rubella (MMR), polio, hepatitis B, and chickenpox.

Deputy CDC Director of Viral Diseases Dr. Jane Seward says vaccinations will prevent more than 320 million illnesses, 21 million hospital stays and more than 730 thousand deaths during the children's lifetimes.

The report also found more children are getting the vaccine for rotavirus -- which causes diarrhea and vomiting.   Hepatitis A vaccines rose from just under 82 percent in 2012 to 83 percent in 2013.  And the rate for hepatitis B vaccines rose from nearly 72 percent to 74 percent.

But, the report found second doses and booster shots for 2 year olds are falling behind.  That includes the diphtheria, tetanus and pertussis vaccine and the type b can cause severe diseases like meningitis. Also lagging are PCV shots which prevents pneumococcal disease. It can trigger ear infections and meningitis.

Dr. Seward says parents who've fallen behind can ask their Doctors who will bring vaccines back on schedule.

One big concern is 1 in 12 children did not get their first dose of the MMR vaccine on time, putting lots of kids at risk for measles.

 Most insurance plans cover vaccines. People who can't afford them can turn to the federal Vaccines for Children Program, which provides them for free.

Dr. Seward says Florida is doing great in child vaccinations, but there are some communities that need help.

Photo Credit:Jeff J Mitchell / 2007 Getty Images