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Itisha Arya

US Measles Cases Surge Past 2,000, Putting Elimination Status At Risk

usa measles

More than 2,000 measles cases have been recorded in the United States this year, according to federal health data, marking the highest annual total the country has seen in several decades.

Active outbreaks, most notably in upstate South Carolina and in communities along the Arizona-Utah border — are continuing to report new infections each week. Health officials warn that this sustained spread could jeopardise the measles elimination status the US has maintained for the past 25 years.

<h2>Measles Cases Surge Past 2,000 In The US</h2>

As of December 30, a total of 2,065 confirmed measles cases had been reported nationwide in 2026, based on figures released Wednesday by the US Centers for Disease Control and Prevention. The last time annual measles infections crossed the 2,000 mark was in 1992, shortly after public health authorities revised vaccination guidance to recommend two doses of the measles-mumps-rubella (MMR) vaccine for children instead of one.

<h2>Measles: How Effective Is The Measles Vaccine?</h2>

Measles is among the most infectious diseases known, but it can be prevented through vaccination. The CDC says a single dose of the MMR vaccine is about 93 percent effective at preventing measles, while two doses increase protection to 97 percent. Despite this, immunisation coverage has been slipping steadily over recent years.

<h2>Measles In US: <span rel="noindex">Falling vaccination rates</span> raise concern</h2>

CDC data shows that during the last school year, only 92.5 percent of children entering kindergarten had received the MMR vaccine. This falls below the 95 percent coverage level that public health experts say is needed to prevent outbreaks and protect communities through herd immunity.

<h2>Measles In US: Why Elimination Status Is Now At Risk</h2>

The US has been considered measles-free since 2000, a designation that means no continuous chains of transmission have lasted longer than a year. However, several large outbreaks reported this year may be linked, raising concerns that ongoing transmission could persist beyond late January and threaten that status.

One major outbreak that began in West Texas in late January was officially declared over in mid-August. That outbreak led to hundreds of related cases across Texas and New Mexico and resulted in three deaths — two children and one adult — all of whom were unvaccinated.

In early October, South Carolina’s health department confirmed a measles outbreak in the state’s upstate region. Over the past four months, that outbreak has grown to nearly 180 cases and continues to spread. At least 20 new infections have been reported since Friday, and close to 300 people are currently in quarantine due to exposure to confirmed cases.

“We know that many of the cases we are seeing involve people who were already under quarantine because of known exposure,” said Dr Linda Bell, South Carolina’s state epidemiologist, speaking on Tuesday. She added that the virus is spreading within households as well as in schools and churches.

Another significant outbreak remains active along the Utah-Arizona border, where more than 350 measles cases have been reported between the two states so far this year.

<h2>Canada Loses Measles-Free Status</h2>

In November, the Pan American Health Organization, which operates under the World Health Organization, announced that Canada had lost its measles elimination status due to a large and ongoing outbreak.

“At the same time, the remaining 34 countries in the region continue to hold their measles-free certification,” said PAHO Director Dr Jarbas Barbosa.

Health officials say potential genetic connections between the Texas outbreak earlier this year and the ongoing outbreak in South Carolina could pose a serious challenge to the US designation.

“The trend we are seeing suggests that more cases are likely to occur well into January,” Bell said. “What that means for our national status as a country that has eliminated measles is still uncertain.”

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More than 2,000 measles cases have been recorded in the United States this year, according to federal health data, marking the highest annual total the country has seen in several decades.Active outbreaks, most notably in upstate South Carolina and in communities along the Arizona-Utah border — are continuing to report new infections each week. Health officials warn that this sustained spread could jeopardise the measles elimination status the US has maintained for the past 25 years.Measles Cases Surge Past 2,000 In The USAs of December 30, a total of 2,065 confirmed measles cases had been reported nationwide in 2026, based on figures released Wednesday by the US Centers for Disease Control and Prevention. The last time annual measles infections crossed the 2,000 mark was in 1992, shortly after public health authorities revised vaccination guidance to recommend two doses of the measles-mumps-rubella (MMR) vaccine for children instead of one. Measles: How Effective Is The Measles Vaccine?Measles is among the most infectious diseases known, but it can be prevented through vaccination. The CDC says a single dose of the MMR vaccine is about 93 percent effective at preventing measles, while two doses increase protection to 97 percent. Despite this, immunisation coverage has been slipping steadily over recent years.Measles In US: Falling vaccination rates raise concernCDC data shows that during the last school year, only 92.5 percent of children entering kindergarten had received the MMR vaccine. This falls below the 95 percent coverage level that public health experts say is needed to prevent outbreaks and protect communities through herd immunity.Measles In US: Why Elimination Status Is Now At RiskThe US has been considered measles-free since 2000, a designation that means no continuous chains of transmission have lasted longer than a year. However, several large outbreaks reported this year may be linked, raising concerns that ongoing transmission could persist beyond late January and threaten that status.One major outbreak that began in West Texas in late January was officially declared over in mid-August. That outbreak led to hundreds of related cases across Texas and New Mexico and resulted in three deaths — two children and one adult — all of whom were unvaccinated.In early October, South Carolina’s health department confirmed a measles outbreak in the state’s upstate region. Over the past four months, that outbreak has grown to nearly 180 cases and continues to spread. At least 20 new infections have been reported since Friday, and close to 300 people are currently in quarantine due to exposure to confirmed cases.“We know that many of the cases we are seeing involve people who were already under quarantine because of known exposure,” said Dr Linda Bell, South Carolina’s state epidemiologist, speaking on Tuesday. She added that the virus is spreading within households as well as in schools and churches.Another significant outbreak remains active along the Utah-Arizona border, where more than 350 measles cases have been reported between the two states so far this year.Canada Loses Measles-Free StatusIn November, the Pan American Health Organization, which operates under the World Health Organization, announced that Canada had lost its measles elimination status due to a large and ongoing outbreak.“At the same time, the remaining 34 countries in the region continue to hold their measles-free certification,” said PAHO Director Dr Jarbas Barbosa.Health officials say potential genetic connections between the Texas outbreak earlier this year and the ongoing outbreak in South Carolina could pose a serious challenge to the US designation.“The trend we are seeing suggests that more cases are likely to occur well into January,” Bell said. “What that means for our national status as a country that has eliminated measles is still uncertain.”