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Health officials in New York City said they are investigating a cluster of Legionnaires' disease. As of July 6, 23 cases of Legionnaires' disease have been confirmed in two of Manhattan's Upper East Side neighborhoods, according to the New York City Department of Health. So far, no deaths have been associated with the cluster. In a notice to the two neighborhoods -- Carnegie Hill and Yorkville -- the department said it believes the likely source of the bacteria is a cooling tower in the area, which sprays a mist that contains the bacteria. (Kekatos, 7/7)

The World Health Organization (WHO) has launched a new database that organization officials hope will help improve understanding of the prevalence of sexually transmitted infections (STIs) in low- and middle-income countries (LMICs). The STI Prevalence Atlas, launched late last week, tracks five of the most common STIs: chlamydia, gonorrhea, herpes simplex virus type 2 (the main cause of genital herpes), syphilis, and trichomoniasis. (Dall, 7/6)

As the deadly New World screwworm spreads through Texas, posing significant risk to the US cattle herd, experts are still puzzling over the mystery of how it got there. The parasite fly’s larvae, which feeds within the wounds of warm-blooded animals, was first detected in a calf in Zavala County at the start of last month, marking the first case in the country’s livestock in about five decades. Detections have grown to more than 30, and it’s still unclear how the pest got into the US or how it is spreading. (Peng, 7/6)

The United States is on the brink of surpassing last year’s total measles cases, putting the country on track to set a new record before summer’s end. The impending milestone underscores how the country has entered a new phase in its battle with measles, with repeated new infections of the deadly disease igniting sustained outbreaks in multiple states rather than staying concentrated in a few undervaccinated communities. (Sun, 7/6)

Influenza vaccination reduced the risk of death from flu among U.S. kids and teens in recent years, researchers found. Overall vaccine effectiveness against influenza fatalities was 80% (95% CI 75-84) from August 2016 through July 2025, reported Brendan Flannery, PhD, of the CDC in Atlanta, and colleagues. (Henderson, 7/6)

Respiratory tract infections in children often lead to a visit with a pediatrician and can even require a trip to the emergency department or hospitalization. A study published in JAMA Network Open looked at why some children with acute respiratory infections experience severe complications and found that that children who had two or more chronic conditions or who had been transferred from another hospital tend to be sicker. (Holohan, 7/6)