There were 681 measles cases in 22 states this year, according to CNN's analysis of data from state and local health departments.
States reporting measles cases include Arizona, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Maryland, Massachusetts, Michigan, Missouri, Nevada, New Hampshire, New Jersey, New York , Oregon, Tennessee, Texas and Washington.
As of Monday, the United States Centers for Disease Control and Prevention reported 626 individual cases of measles confirmed in these 22 states. This also applies to diseases reported to the CDC by public health departments until 19 April, and therefore does not take into account cases reported since.
The agency updates the number of measles cases every Monday.
Previously, most cases had been reported in 201
4 since the 667 elimination.
"Most cases we see are in unvaccinated communities"
Illness that is caused by a virus that can spread through the air when an infected person coughs or sneezes or someone directly comes into contact or by touching the same objects or surfaces germs shares. The symptoms of measles include fever, cough, runny nose, watery eyes and a rash of red spots.
Most cases in the United States have occurred in communities with low rates of vaccination against the virus, according to public health officials.  "I really believe that parents' concerns about vaccines lead to a vaccine, and most of the cases we see are in unvaccinated communities," Dr. Nancy Messonnier, director of the National Center for Immunization and Respiratory Diseases at CDC, said at a congressional hearing on measles outbreaks in February.
The United States has a high number of measles vaccines nationally. According to the CDC, 91.5% of US children aged 19 to 35 months received at least one dose of the measles, mumps and rubella vaccine last year.
"However, there are pockets of people who are vaccine-delaying," Messonnier said.
"Measles fractures occur when measles enter these communities of unvaccinated people," she said. "The only way to protect yourself against measles is vaccination."
A source familiar with the measles situation in the United States told CNN earlier that out of 626 measles surveyed by federal officials last week, 72% are unvaccinated and 18% have unknown vaccination status. Among the uninoculated it can be for personal reasons and for medical reasons. The other 10% were vaccinated with one or two doses.
Of these 626 cases, 487 were under 19 years old.
The CDC has noted that these outbreaks have been linked to infected travelers and bring back measles from other countries, including Israel, Ukraine and the Philippines.
For example, the outbreak in New York, which was declared a public health emergency last month, started when an unvaccinated child became infected during a visit to Israel, health officials said.
A New Yorker Unknowingly Contagious With the measles, he visited Southeast Michigan and spread the disease to at least 38 people, according to Lynn Sutfin, Information Officer for the Michigan Department of Health and Human Services.
The History of Measles in America
] In 1912, measles became a nationally notifiable disease in the US, which meant that health care providers and laboratories had to report diagnosed cases. In this first decade of reporting, an average of approximately 6,000 measles deaths were reported each year.
In the 1950s, researchers isolated the measles virus in a patient's blood, and in the 1960s, they managed to convert the virus into a virus a vaccine. The vaccine was licensed and then used as part of a vaccination program.
Before the measles program was launched in the United States in 1963, the CDC claimed that 3 to 4 million people a year contracted the disease nationwide. Thereafter, measles cases and deaths occurred in the United States and other developed countries. In the United States, 963 cases were reported in 1994 compared to 508 in 1996.
By the year 2000, when there were only 86 cases, US measles were declared eliminated, meaning that the disease did not exceed 100%. was transferred 12 months.
Since 2000, the annual number of reported measles cases has risen from 37 in 2004 to 667 in 2014.
The measles, mumps and rubella vaccine – known as the MMR vaccine – is very effective. One dose is approximately 93% effective in preventing measles when you come into contact with the virus. Two doses are about 97% effective.
Experts recommend that children receive the vaccine in two doses: first between 12 and 15 months and a second between 4 and 6 years.
All medicines, including vaccines, are likely to react. according to the CDC. These are usually mild and disappear by themselves, but there is a "small chance" of side effects and even serious injury.
According to experts, the benefit of measles vaccines outweighs.