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Avian influenza (‘bird flu’) is a highly transmissible and usually mild disease that affects wild birds such as geese, swans, seagulls, shorebirds, and also domestic birds such as chickens and turkeys. (CDC and NIAID)

Bird flu FAQ: What is avian influenza? How is it transmitted to humans? What are the symptoms? Are there effective treatments and vaccines? Will H5N1 become the next viral pandemic?

Avian influenza — commonly known as ‘bird flu’ — is infecting domestic and wild birds in Canada and around the world.
Bird flu is transmitted mainly by wild birds, like these snow geese in Ruthsberg, Md., in January 2023. Photo by JIM WATSON/AFP via Getty Images

As bird flu continues to spread in the US and worldwide, what’s the risk that it could start a human pandemic? 4 questions answered

Avian influenza viruses have evolved to infect birds, but the current H5N1 outbreak is also infecting a wide range of mammals. This suggests that it could mutate into forms that threaten humans.
Broad protection from a universal flu vaccine could replace seasonal flu shots. Flavio Coelho/Moment via Getty Images

How do you make a universal flu vaccine? A microbiologist explains the challenges, and how mRNA could offer a promising solution

Annual flu vaccines are in a constant race against a rapidly mutating virus that may one day cause the next pandemic. A one-time vaccine protecting against all variants could give humanity a leg up.
Many viruses interact with the olfactory system, and can damage other areas of the brain through it. Mohammed Haneefa Nizamudeen/iStock via Getty Images Plus

Vaccination to prevent dementia? New research suggests one way viral infections can accelerate neurodegeneration

Inflammation and damage to the olfactory system from shingles, COVID-19 and herpes infections may contribute to Alzheimer’s disease.
Cells secrete exosomes carrying molecules that play a critical role in both health and disease. Meletios Verras/iStock via Getty Images Plus

Chickenpox and shingles virus lying dormant in your neurons can reactivate and increase your risk of stroke – new research identified a potential culprit

People with an active case of shingles have up to an 80% higher risk of stroke than those without. The increased risk is highest for patients under 40.
The Chinese government has loosened restrictions designed to limit the spread of COVID-19. Kevin Frayer/Stringer via Getty Images

China’s loosened COVID-19 policies – following years of aggressive lockdowns and quarantines – have left the country vulnerable

Strict lockdowns, quarantines and testing have prevented many people in China from catching COVID-19. With concerns over Chinese vaccine efficacy and uptake, China may be facing a looming COVID-19 surge.
Throughout the pandemic, much discussion about COVID-19 transmission focused on individual-level decisions, making it easy to blame the unvaccinated. (Pixabay)

Beyond vaccine hesitancy: Understanding systemic barriers to getting vaccinated

Systemic social issues affect vaccine access and acceptability. Yet, the term ‘vaccine hesitancy’ overlooks this, reducing the multiple factors that affect vaccine uptake to individual-level choices.

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