A new study has found that the rates of childhood vaccination against measles, mumps and measles are decreasing in most of the United States since the beginning of the Covid-19s.
The study was Published in mosque On June 2, vaccination rates were analyzed from measles, mumps and measles (MMR) according to the boycott where the data was available. Researchers at Johns Hopkins University collected data at the boycott level about MMR vaccination rates for kindergarten from the Ministry of Health website in every state for the years before the epidemic (2017-2018) and after (2023-2024). In cases where these data were not available, researchers analyzed the most comparable data instead.
Of the 2066 provinces in 33 states, the researchers analyzed, 78 % of them had a decrease in vaccination rates. The researchers found that the province’s vaccination rate decreased from about 94 % before the epidemic to about 91 % after the epidemic, less than what is less than what Public health experts in general The threshold of the herd immunity against measles should be about 95 %.
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Lauren GardnerA great author of the study and director of the Science and Engineering Center at Johns Hopkins University says that the goal of this research is to obtain “more comprehensive and higher accuracy of the vaccination scene” in the country.
Gardner says that the centers of diseases control and prevention (CDC) has data at the state and state levels, but we know that the vaccination patterns can vary greatly within the state and even with higher accuracy than those through societies, even inside the boycott. This is what we see. “
As of May 29, a total of 1088 cases of measles are confirmed by 33 judicial authority in the United States, According to the Center for Anti -Tennis and Combating. Among those cases, 96 % was in people who were not inconsistent or was not known. So far in 2025, 14 outbreaks were reported and three people confirmed that they died due to complications related to measles, all of whom were Non -fortified. Before this year, the last confirmed death from measles in the country Get In 2015.
Getting vaccination is the best way to protect from measles. MMR vaccine is both safe and effective, and CDC He said Most people who get it will be protected against measles for life.
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The new study found that only four out of 33 years have been analyzed by the researchers-Clevornia, Connecticut, Min, and New York-with an increase in vaccination rates at the boycott level. Researchers have not searched for the reasons behind different rates, and Gardner says many factors – including the influence of the epidemic on access to health care, different population, the quality of the reported data, and the frequency of the vaccine – play a role in community vaccination rates. But it also notes that the four countries that have reported an increase in measles vaccination are among the few Do not allow non -medical exemptions For school immunization requirements, such as MMR vaccine.
Gardner says that Hawaii has emerged in the study because she witnessed a significant decrease in the measles vaccine covering; Before the epidemic, its average was about 95 %, but after the epidemic, it decreased to about 80 %. On average, Wisconsin has the lowest rate of vaccination between the states surveyed; His last rate was in the seventies.
Gardner says the average vaccination rate in the state may be misleading because the rate can vary greatly within societies. She says it will be perfect if researchers can get more granules with data and school analysis by school.
“The higher the high granules you get,” Gardner says. “The more actually you see problems – then you can also respond to it and know where it is really important to go to and try to help raise vaccination rates,” Gardner says.
