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Legionnaires’ outbreak worsens in NYC 🏙️

Legionnaires’ kills 2 in Harlem, bird flu slows, and new vaccines show promise.

August 5, 2025

Health News:

  • Most Americans don’t plan on getting a COVID shot this fall. (Hill)

  • 2 people are now dead and at least 58 people are sick from the growing Legionnaires’ disease cluster in New York City. (ABC)

  • Hand, foot, and mouth disease is spreading more than usual this summer, pediatricians say. (NY Times)

  • Raw milk from a farm with poor sanitation practices was linked to 21 cases of Campylobacteriosis and Shiga-toxin producing E. coli in Florida. (WUSF)

  • Freeze dried fruit sold at Sam’s Club has been recalled due to possible Listeria contamination. (CBS)

  • The UK is offering the world’s first gonorrhea vaccine in sexual health clinics starting this week. (BBC)

  • There are 7 suspected TB cases at an ICE detention facility in Washington state. (King 5)

  • Benadryl’s risks outweigh its usefulness, experts say. New allergy meds are better and safer. (CNN)

  • A new study suggests that avoiding ultraprocessed foods might double weight loss. (NY Times)

Climate Health News:

  • The growing spread of babeosis, a tick-borne disease, is linked to climate change in New England. (CIDRAP)

  • A recent trial found that adding ‘ecolabels’ to restaurant menus led diners to select equally healthy dishes with an average carbon footprint 9.2% lower. (JAMA)

Mental Health & Substance Use News:

  • Some good news: teen suicides are declining according to federal data. (NPR)

  • Most U.S. adults are stressed out by rising grocery prices. (Axios)

  • ChatGPT is adding mental health guidelines to better detect signs of mental or emotional distress, after the company says it “fell short” in recognizing delusion in some users. (NBC)
     

If you or someone you know may be considering suicide or need help, call 988 or message the Crisis Text Line by texting HOME to 741741.

Best Questions:


What is Legionnaires' Disease?

Legionnaires’ disease is a type of severe pneumonia caused by breathing in mist that contains Legionella bacteria. Most healthy people aren’t affected, but those at higher risk due to other medical conditions can get Legionnaires’ disease and as many as one in ten die. 

It’s named after an outbreak among people who went to a convention at the American Legion - how’s that for brand risk? 

Legionella lives in water and can be transmitted to people as a fine mist that they breathe in, as in a shower or hot tub. Most often, we see this come into play in large commercial buildings (often older) with water cooling towers, hot water tanks, complex plumbing systems, or if a building has been closed for a long time and water has been sitting in the tanks and pipes. It’s important to ensure a well-maintained water system and take precautions like cleaning and flushing your system before reopening after a long closure.

Zero Hour Health clients can access a full Q&A on Legionnaires’ aimed at common manager and employee questions in our app. 

Sources: ABC, CDC


Why is bird flu back in the news? Are cases rising?

Bird flu outbreaks have slowed down dramatically on American dairy farms. Though there are still infections being reported here and there (like one this week in California), overall new cases are way down, with just four in the past month across the U.S.

Despite the slowdown, scientists are still rushing to find out why and how it spread so quickly, to help prevent it in the future. A new preprint study looked at over a dozen California farms, testing air, wastewater and milk in two different regions. They found two key pathways that the virus could spread: in the air during the milking process and in wastewater. Some of the positive wastewater was found in fields and manure lagoons used by migratory birds. That’s important, too, because it’s a way that the virus could spread back to birds or other animals, which in turn increases the chances of it spreading back to humans.

The key learning in this new study is that the virus is spreading in multiple ways on farms. That creates a logistical challenge, but also helps farmers understand how better to prevent it from spreading. While our hope is that H5N1 spread on dairy farms comes to a full stop soon, we’re very glad that we have more tools in our toolkit to fight the next outbreak that affects cattle, whether it’s H5N1 or something else. 

Sources: CIDRAP, APHIS

Best Read:


Keeping an eye on the New World screwworm’s march toward the border is key, but there’s no reason to panic just yet. The U.S. has dedicated nearly $30 million to the effort to limit the population, though some in the beef industry say that’s not enough for the scale of the problem. 

Avian Flu Wiped Out Poultry. Now the Screwworm Is Coming for Beef. - The New York Times