Enlarge / A brightly colored transmission microscope image of measles viruses. (credit: Getty | BSIP )

A team of health experts from the Centers for Disease Control and Prevention arrived in Chicago Tuesday to help respond to a flare-up of measles cases at a migrant shelter in the city's Pilsen neighborhood, according to CNN .

So far, there have been four cases identified at the Halsted Street shelter: two young children, one recovered and one hospitalized in good condition as of March 10; and according to an announcement on Monday, March 11 , two adults who were reported in good condition.

The four cases come just days after the city's health department announced a measles case in a Chicago resident with no recent travel outside of the city and no reported connection with the shelter. The case, announced on March 7 , was the first measles case identified in the city since 2019, officials noted. It remains unclear how that resident contracted the highly infectious virus, though the health department noted that the person had been in contact with domestic and international travelers. The person was said to be recovering well at home, and their infectious period ended on March 6.

Enlarge / Cinnamon (Photo by Hoberman Collection/Universal Images Group via Getty Images) (credit: Getty | Hoberman Collection )

Six different ground cinnamon products sold at retailers including Save A Lot, Dollar Tree, and Family Dollar contain elevated levels of lead and should be recalled and thrown away immediately, the US Food and Drug Administration announced Wednesday.

The brands are La Fiesta, Marcum, MK, Swad, Supreme Tradition, and El Chilar, and the products are sold in plastic spice bottles or in bags at various retailers. The FDA has contacted the manufacturers to urge them to issue voluntary recalls, though it has not been able to reach one of the firms, MTCI, which distributes the MK-branded cinnamon.

Products identified by the FDA as containing elevated lead levels. (credit: FDA )

The announcement comes amid a nationwide outbreak of lead poisoning in young children linked to cinnamon applesauce pouches contaminated with lead and chromium. In that case, it's believed that a spice grinder in Ecuador intentionally added extreme levels of lead chromate to cinnamon imported from Sri Lanka, likely to improve its weight and/or appearance. Food manufacturer Austrofoods then added the heavily contaminated cinnamon, without any testing, to cinnamon applesauce pouches marketed to toddlers and young children across the US. In the latest update , the Centers for Disease Control and Prevention has identified 468 cases of lead poisoning that have been linked to the cinnamon applesauce pouches. The cases span 44 states and are mostly in very young children.

Enlarge / A view of the Centers for Disease Control and Prevention headquarters in Atlanta. (credit: Getty | Nathan Posner )

COVID-19 is becoming more like the flu and, as such, no longer requires its own virus-specific health rules, the Centers for Disease Control and Prevention said Friday alongside the release of a unified " respiratory virus guide ."

In a lengthy background document , the agency laid out its rationale for consolidating COVID-19 guidance into general guidance for respiratory viruses—including influenza, RSV, adenoviruses, rhinoviruses, enteroviruses, and others, though specifically not measles. The agency also noted the guidance does not apply to health care settings and outbreak scenarios.

"COVID-19 remains an important public health threat, but it is no longer the emergency that it once was, and its health impacts increasingly resemble those of other respiratory viral illnesses, including influenza and RSV," the agency wrote.

Enlarge / The Moderna Spikevax COVID-19 vaccine is shown at a CVS in 2023. (credit: Getty | Melissa Phillip/Houston Chronicle )

People ages 65 and up should get another dose of a COVID-19 vaccine this spring, given the age group's higher risk of severe disease and death from the pandemic virus, the Centers for Disease Control and Prevention announced Wednesday.

Earlier today, an advisory committee for the CDC voted overwhelmingly in favor of recommending the spring booster dose. And late this afternoon, CDC Director Mandy Cohen signed off on the recommendation, allowing boosting to begin.

"Today’s recommendation allows older adults to receive an additional dose of this season’s COVID-19 vaccine to provide added protection," Cohen said in a statement. "Most COVID-19 deaths and hospitalizations last year were among people 65 years and older. An additional vaccine dose can provide added protection that may have decreased over time for those at highest risk."

Enlarge / A child with measles. (credit: Greene, Charles Lyman )

Florida health officials on Sunday announced an investigation into a cluster of measles cases at an elementary school in the Fort Lauderdale area with a low vaccination rate, a scenario health experts fear will become more and more common amid slipping vaccination rates nationwide.

On Friday, Broward County Public School reported a confirmed case of measles in a student at Manatee Bay Elementary School in the city of Weston. A local CBS affiliate reported that the case was in a third-grade student who had not recently traveled. On Saturday, the school system announced that three additional cases at the same school had been reported, bringing the current reported total to four cases.

On Sunday , the Florida Department of Health in Broward County (DOH-Broward) released a health advisory about the cases and announced it was opening an investigation to track contacts at risk of infection.

Enlarge / A woman with Long COVID who is completely bedridden, requiring the use of a wheelchair to move between rooms of her home. (credit: Getty | Rhiannon Adam )

Over four years after SARS-CoV-2's debut, researchers still struggle to understand long COVID, including the ostensibly simple question of how many people have it. Estimates for its prevalence vary widely, based on different study methods and definitions of the condition. Now, for the first time, the Centers for Disease Control and Prevention has attempted to estimate its prevalence among adults in each US state and territory. The results again show a wide range of prevalence estimates while revealing the states that were hardest hit as well as those that seem relatively spared.

Overall, the CDC found that seven states in the South, West, and Midwest had the highest prevalence of long COVID in the country, between 8.9 percent and 10.6 percent: Alabama, Montana, North Dakota, Oklahoma, Tennessee, Wyoming, and, the state with the highest prevalence of 10.6 percent, West Virginia. The results are published today in the CDC's Morbidity and Mortality Weekly Report .

On the other end of the spectrum, New England states, Washington, and Oregon had lower prevalence rates, between 3.7 percent and 5.3 percent. The lowest rate was seen in the US Virgin Islands with 1.9 percent. Washington, DC, and Guam had ranges between 1.9 percent and 3.6 percent.

Enlarge (credit: Getty | Thomas Trutschel )

The Centers for Disease Control and Prevention is preparing to update its COVID-19 isolation guidance, moving from a minimum five-day isolation period to one that is solely determined by symptoms, according to a report from The Washington Post .

Currently, CDC isolation guidance states that people who test positive for COVID-19 should stay home for at least five days, at which point people can end their isolation as long as their symptoms are improving and they have been fever-free for 24 hours.

According to three unnamed officials who spoke with the Post, the CDC will update its guidance to remove the five-day minimum, recommending more simply that people can end their isolation any time after being fever-free for 24 hours without the aid of medication, as long as any other remaining symptoms are mild and improving. The change, which is expected to be released in April, would be the first to loosen the guidance since the end of 2021.

Enlarge / A cat, but not the one with plague. (credit: Getty | Silas Stein )

An Oregon resident contracted bubonic plague from their "very sick" pet cat, marking the first time since 2015 that someone in the state has been stricken with the Black Death bacterium, according to local health officials.

Plague bacteria, Yersinia pestis , circulates cryptically in the US in various types of rodents and their fleas. It causes an average of seven human cases a year, with a range of 1 to 17, according to the Centers for Disease Control and Prevention. The cases tend to cluster in two regions, the CDC notes: a hotspot that spans northern New Mexico, northern Arizona, and southern Colorado, and another region spanning California, far western Nevada, and southern Oregon.

The new case in Oregon occurred in the central county of Deschutes. It was fortunately caught early before the infection developed into a more severe, systemic bloodstream infection (septicemic plague). However, according to a local official who spoke with NBC News, some doctors felt the person had developed a cough while being treated at the hospital. This could indicate progression toward pneumonic plague, a more life-threatening and more readily contagious variety of the plague that spreads via respiratory droplets. Nevertheless, the person's case reportedly responded well to antibiotic treatment, and the person is recovering.

Enlarge / This thin section transmission electron microscopic (TEM) image reveals numerous spheroid-shaped Enterovirus-D68 (EV-D68) virions. (credit: CDC/ Cynthia S. Goldsmith, Yiting Zhang )

2022 was the bad year that wasn't—at least for a mysterious paralyzing condition in children.

In the decade before, hundreds of young, healthy kids in the US abruptly felt their limbs go weak. Debilitating paralysis set in. In recent years, around half of affected children required intensive care. About a quarter needed mechanical ventilation. A few died, and many others appear to have permanent weakness and paralysis.

Researchers quickly linked the rare polio-esque condition to a virus known for causing respiratory infections, often mild colds: enterovirus D68, or EV-D68 for short. Identified decades ago, it's a relative of polio, one of the over 100 non-polio enteroviruses that float around. But when EV-D68 began surging, so did the mysterious paralyzing condition, called acute flaccid myelitis, or AFM. The menacing pair seemed to come in waves every other year, likely starting with a cluster of cases in California in 2012 . In 2014, there were 120 AFM cases in 34 states . In 2016, 153 cases in 39 states. In 2018, 238 cases in 42 states. By contrast, there were just a few dozen cases or so in each of the years in between, cases that were sporadic or unrelated to EV-D68.