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The Latest Breaking News from CDC

Summer Floods, Swimming Holes, and Outdoor Adventures Are Creating the Perfect Conditions for a Waterborne Bacterial Disease That Most Americans Have Never Heard Of

Leptospirosis — caused by bacteria in animal urine that contaminate soil, water, and flood zones — peaks in summer outdoor activity season. The CDC updated leptospirosis prevention guidance in February 2026. Globally, it kills 60,000 annually. Here is what summer adventurers, flood victims, and outdoor enthusiasts must know.

Medical Daily

New York Vacation Rental Hot Tub Linked to Legionnaires' Disease in CDC MMWR Report as Owner Refuses Closure

CDC MMWR (June 11, 2026): A hot tub at a private vacation rental in western New York caused a Legionnaires' disease outbreak in 2024–2025. Whole-genome sequencing confirmed the link. The rental owner initially refused to comply with CDC guidance. Here is what summer vacationers and Airbnb renters need to know.

Medical Daily

Chikungunya Hits Mauritius as the CDC Now Has Four Simultaneous Active Outbreaks Listed — the Widest Multi-Country Chikungunya Warning Since 2014

CDC issued a new chikungunya travel notice for Mauritius on May 14, 2026 — now the fourth simultaneous active chikungunya outbreak notice alongside Suriname, French Guiana, and Mayotte. The FDA-approved Ixchiq vaccine is available but widely underutilized. Here is the full warning.

Medical Daily

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Rare Tsetse Fly-Borne Disease Found in Safari Travelers Returning from Zambia and Zimbabwe, Highlighting a Diagnostic Blind Spot in the U.S.

The CDC has an active travel notice for East African Sleeping Sickness (HAT) in Zambia and Zimbabwe after multiple cases in safari travelers, including the first U.S. Zambezi Valley case since 2019. The disease is fatal without treatment and rapidly fatal without prompt diagnosis. Here is the safari season warning.

Medical Daily

Every American Flight from DRC, Uganda, and South Sudan Is Now Rerouted to Four Specific Airports for Ebola Screening — Here Is What That Means for Travelers

As of 2026, US authorities are rerouting all incoming air travel from DRC, Uganda, and South Sudan to Washington-Dulles, Atlanta Hartsfield-Jackson, Houston IAH, or JFK for enhanced Ebola screening. Here is what this policy means for travelers, health workers, and families in those countries.

Medical Daily

Ebola, hantavirus, diphtheria: how distrust in health care is fuelling multiple outbreaks across the globe

The first half of 2026 has been marked by three different disease outbreaks: Ebola, hantavirus and, in Australia, diphtheria. Each has exposed vulnerabilities in how we detect, communicate and respond to infectious disease outbreaks.

The Conversation

Chikungunya Outbreaks Are Now Active in Three Different Countries and Territories Simultaneously — and Summer Travelers Are at Risk from the Caribbean to the Indian Ocean

Active CDC travel notices cover chikungunya outbreaks in Suriname (Feb 2026), Mayotte (March 2026), and French Guiana (June 4, 2026). The FDA-approved Ixchiq vaccine is available but underused. Here is everything summer travelers to the Caribbean and Indian Ocean need to know.

Medical Daily

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Parainfluenza Virus Is Surging Nationally Right Now, and Parents Need to Know the Signs of Croup Before It Becomes a Breathing Emergency

CDC respiratory surveillance updated June 12, 2026 confirms parainfluenza virus (PIV) is elevated nationally. PIV is the leading cause of croup in young children. Summer camp and daycare season is peak exposure time. Here is what parents need to recognize — and when to go to the ER.

Medical Daily

CDC Issues New Yemen Malaria Travel Alert as Dangerous Parasite Spreads into Previously Low-Risk Areas: What Travelers and Aid Workers Need to Know

The CDC issued a new Level 2 Travel Health Notice for malaria in Yemen on June 11, 2026, as cases spread into previously low-risk areas. WHO EMRO confirmed 1.44 million cases tested in 2025. Yemen's malaria is almost exclusively Plasmodium falciparum — the deadliest species. Here is what travelers need…

Medical Daily

Baby formula sold at Target is recalled across the US after multistate botulism outbreak

Infant botulism is a rare but serious illness that occurs in babies under age 1

The Independent UK

Nara Organics recalls baby formula sold at Target after multistate infant botulism outbreak

Nara Organics has recalled its organic baby formula sold at Target stores and online due to a multistate outbreak of infant botulism

AAP

Meningococcal Cases Reach Second-Highest Level in Over a Decade as Drug-Resistant Strain Disproportionately Hits Black Americans

CDC surveillance data (updated June 2026): 463 meningococcal disease cases in 2025 — the second-highest annual count since 2014. The dominant ST-1466 strain is drug resistant and disproportionately kills Black adults ages 30–60 and people with HIV. Here is the full picture.

Medical Daily

Rocky Mountain Spotted Fever Kills Within Days and Is Frequently Mistaken for Flu — Tick Season 2026 Is a Critical Window to Know the Warning Signs

Rocky Mountain spotted fever kills 5–10% of patients even with treatment and can be fatal within 3–5 days. Peak season runs May through August. A February 2026 CDC EID study documents 19.8% fatality in pediatric cases. Doxycycline must be started before test results. Here is the full warning.

Medical Daily

Yellow Fever Colombia 2026 Outbreak: 76 Dead Since 2024 with Case Fatality Rate Exceeding 70 Percent as CDC Issues Active Level 2 Travel Notice

Yellow fever in Colombia has killed 76 people since 2024, with case fatality rates exceeding 40–70% in some periods. 35 cases and 18 deaths in 2026 alone. Venezuela also reports an active outbreak. CDC Level 2 travel notice covers Colombia and South America. Here is what travelers need to know.

Medical Daily

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Medical Daily

Counterfeit Botox Injections Are Sending People to Hospitals in Multiple U.S. States — and the CDC Warns the Risk Is Ongoing

The CDC has an active warning about harmful and potentially fatal reactions from counterfeit Botox and mishandled botulinum toxin injections, documented across multiple U.S. states. A 2024 investigation found 22 hospitalizations, including 4 on ventilators. The CDC warning remains active in 2026.

Medical Daily

The CDC Now Recognizes Chagas Disease as Endemic in the United States — and an Estimated 300,000 Americans May Have It Without Knowing

The CDC's September 2025 Emerging Infectious Diseases study confirms Chagas disease should be recognized as endemic in the U.S. with human cases in 8 states and kissing bugs in 32. An estimated 300,000 Americans are living with it — most undiagnosed. Here is what residents in the South and Southwest…

Medical Daily

ByHeart Infant Formula Botulism Outbreak Post-Investigation 2026: Root Cause Still Unidentified Despite Genetic Match to Milk Powder Supplier

The FDA and CDC declared the ByHeart infant formula botulism outbreak over on February 26, 2026 after 48 infants were sickened across 17 states. A June 10, 2026 Food Safety Magazine investigation reveals the root cause remains unidentified despite genetic matches to organic whole milk powder. New testing protocols are…

Medical Daily

Hepatitis A Outbreak in Canada Leaves 4 Dead, 142 Hospitalized; CDC Issues Travel Notice as Many Americans Traveling to Canada Remain Unvaccinated.

The CDC issued a hepatitis A travel notice for Manitoba, Canada on June 4, 2026. The outbreak has grown to 658 cases, 142 hospitalizations, and 4 deaths since April 2025. Winnipeg restaurant exposures have been identified. Here is what U.S. travelers need to know before visiting Canada.

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Medical Daily

Deadly New Sedative Found in Street Drugs Across 18 States; Experts Warn Naloxone Alone Cannot Reverse Its Effects

The CDC issued a Health Advisory on April 2, 2026 warning that medetomidine, a veterinary sedative, is now detected in fentanyl samples across 18 states and D.C. Detections rose 3,000% between 2023 and 2025. Naloxone does not reverse its effects, and withdrawal can cause life-threatening hypertension.

Bored Panda

The Age You Lost Your Virginity May Define How You Age In Later Life, Study Reveals

Researchers in China found that earlier intimate activity may affect people’s aging process.

The Guardian - US

Data is not enough: from Covid to measles, America must relearn risk communication

The confusion over hantavirus and Ebola is a reminder that we must do better at explaining how to respond to an outbreak

Medical Daily

Diphtheria Outbreak 2026: CDC Issues New Sub-Saharan Africa Travel Alert Covering 7 Countries with Over 20,000 Cases and 1,252 Deaths in 2025

The CDC issued a new diphtheria travel alert for Chad, Guinea, Niger, Nigeria, Mali, Mauritania, and Somalia on June 2, 2026. WHO documented 20,412 suspected cases and 1,252 deaths in Africa in 2025. Here is what travelers and unvaccinated Americans need to know.

Medical Daily

Invasive Group A Strep Remains at Near-Record Levels in 2026, and Homeless Shelters Are Now Documented Outbreak Amplifiers, CDC Reports

Invasive Group A Streptococcus (iGAS) hit a 20-year high in 2023 and remains elevated in 2026. A new CDC Emerging Infectious Diseases study (June 2026) documents a shelter-linked outbreak in Chicago with 41 cases and 2 deaths. Here is the full picture.

Medical Daily

Mpox Clade I Has Spread Beyond Africa and Is Now Circulating Locally in Europe. The CDC Expects More U.S. Cases — and the Vaccine Gap Is Getting Harder to Ignore.

More than 20 clade I mpox cases have been confirmed in the U.S. as of June 2026. The CDC now expects additional cases as local clade Ib transmission has been detected in Europe among men who have sex with men with no travel history to Africa. JYNNEOS vaccine uptake lags…

Medical Daily

Whooping Cough Is Still Killing Americans in 2026, and California, Washington, Ohio, and Florida Are Leading a Surge That Is Far from Over

Whooping cough hit its highest U.S. case count in more than a decade in 2024 and 2025, killing infants and adults. In 2026, California leads the nation with nearly 700 cases. Falling vaccination rates, waning immunity, and public health cuts are driving the surge. Here is the full picture.

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