Early hopes around a treatment can change once stronger evidence appears. Sometimes benefits are smaller than first believed. Other times the real value is different than expected.

New research suggests Paxlovid may not lower hospitalization or death rates in certain vaccinated high-risk adults. However, it may still help people recover faster. The findings came from two randomized controlled trials, considered a strong form of medical evidence. Researchers studied people who had received COVID-19 vaccines and were still considered at higher risk for complications.

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While the COVID-19 pandemic has been declared over, the effects of COVID-19 are still felt across the United States. Fortunately, recent research reinforces the effectiveness of COVID-19 vaccines, showing that the 2025–2026 vaccine reduced emergency room and urgent care visits by 50% and hospitalizations by 55%.

While the virus continues to mutate, this research is crucial. It shows that updated vaccines can still provide meaningful protection against severe illness.

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Entering the hotter months of the year, the risk of tick-borne disease transmission increases significantly. As the climate warms, researchers warn that these threats may continue to worsen. For this reason, experts encourage anyone spending time outdoors to understand common tick-borne illnesses and how to prevent them.

Ticks can spread diseases, including Lyme disease, Rocky Mountain spotted fever, ehrlichiosis, babesiosis, anaplasmosis, and alpha-gal syndrome. Researchers are currently developing a vaccine to help prevent Lyme disease, but it is not yet available to the public. Current plans for the vaccine would require three initial doses followed by annual boosters. As a result, experts say preventive measures will remain important even if a vaccine becomes widely available.

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Antibiotic resistance is one of humanity’s oldest ongoing biological battles. This struggle began long before humans created modern antibiotic medicines. Today, bacteria are gaining ground while antibiotics steadily lose effectiveness worldwide. Now, one out of six bacterial infections shows some resistance. Antibiotic-resistant bacteria cause more than four million deaths each year.

Human antibiotic use increases the speed of resistance development in bacteria. However, this battle is also unfolding in an unexpected place: the soil. Soil ecosystems have hosted antibiotic competition for thousands of years.

Researchers studied how environmental changes might influence antibiotic resistance patterns. They discovered that drought conditions can increase resistance in soil bacteria. This finding suggests soil resistance may contribute to human bacterial infections.

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In the First Boer War, Dutch Boers studied British weaknesses carefully. British troops wore bright uniforms and used weak battlefield formations. These flaws made them easy targets for skilled Boer fighters. Boer farmers developed ambush tactics that surprised British forces. These strategies helped them win the First Boer War.

Long conflicts often force both sides to adapt and evolve. A similar battle exists between viruses and bacteria over time. They have fought each other for millions of years. Each side develops defenses and countermeasures to survive attacks. This conflict stores valuable genetic information inside bacterial genomes.

Researchers studied this genetic data to find antiviral defense systems. They created databases that catalog thousands of protective bacterial proteins. These discoveries may help create powerful new therapies for humans.

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Today, infectious diseases remain the leading source of preventable death around the world. Compounding this problem, reliable diagnostics are often difficult to access. Current methods can take time, and they cannot always detect diseases early enough for the best treatment outcomes.

Recently, researchers explored whether metabolomics could help identify infections sooner. Metabolomics is the study of small molecules called metabolites. These molecules can serve as biomarkers, showing signs of infection within the body.

To evaluate how well metabolomics works for disease detection, researchers conducted a systematic review and meta-analysis. Their review covered studies published from 2014 to 2025. Across these studies, researchers examined whether metabolomics biomarkers could accurately identify bacterial, viral, and parasitic infections.

In their findings, researchers showed that metabolomics biomarkers were reliable diagnostic aids. In particular, they showed promise in detecting diseases during early stages of infection. Accordingly, researchers suggest that metabolomics could become an additional tool alongside more traditional diagnostic methods.

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For years, natural medicine and modern science have been framed as opposing forces. Many people are told to choose one side or the other. Yet research shows that some traditional remedies may hold real medical value when studied. A new example comes from turmeric and ginger, two plants used in cooking and healing traditions.

Researchers at Washington State University found that extracts from turmeric and ginger may improve bone implants. These findings suggest that ancient knowledge and modern engineering can sometimes work together.

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Sometimes important answers appear in unexpected and surprising places. People often find lost items hidden under cushions or inside drawers. Researchers discovered a similar surprise while studying vitamin D and COVID-19.

Scientists found regular vitamin D intake may reduce Long COVID risk. This finding came from researchers at Mass General Brigham. Their results were published in the Journal of Nutrition.

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Each year, travelers face a changing landscape of health risks. In 2026, global travel, migration, and environmental changes continue to create new opportunities for infectious diseases to spread. Mosquito-borne illnesses are increasing in many regions. Meanwhile, vaccine-preventable diseases, once controlled, are returning in some parts of the world. Understanding these risks is essential for anyone preparing international travel plans.

Among the most significant concerns is dengue fever. Annually, up to 400 million people are infected with dengue worldwide. Of those infected, approximately one-quarter develop symptoms. Cases continue to rise across many regions. Dengue remains one of the most common mosquito-borne illnesses affecting travelers today.

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In surprising findings, recent research has linked vaccines to lower dementia risk. Another recent study may help explain why this connection exists. Researchers found that severe infections may increase dementia risk years later. The findings suggest that preventing infections could help protect brain health.

The study included more than 62,000 older adults. Researchers recruited participants in 2016 and followed them through 2021. Participants were at least 65 years old when the study began. The average participant age was approximately 81 years old.

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