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Articles on SARS-CoV-2

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An accurate count of COVID-19 deaths is critical both scientifically and politically. Douglas Rissing/iStock via Getty Images Plus

COVID-19 deaths in the US continue to be undercounted, research shows, despite claims of ‘overcounts’

Taking into consideration the number of excess deaths caused by COVID-19 compared with pre-pandemic years is critical to getting an accurate accounting of the pandemic’s real toll.
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.
XBB.1.5 is rapidly spreading across the globe and will likely become the next dominant COVID-19 subvariant. (Shutterstock)

FAQ on COVID-19 subvariant XBB.1.5: What is it? Where is it prevalent? How does it differ from Omicron? Does it cause serious illness? How can I protect myself? Why is it nicknamed ‘Kraken’?

The XBB.1.5 subvariant — nicknamed ‘Kraken’ — is arguably the most genetically rich and most transmissible SARS-CoV-2 Omicron subvariant yet.
Red mitochondria in airway cells become coated with green SARS-COV-2 proteins after viral infection: Researchers discovered that the virus that causes COVID-19 damages lungs by attacking mitochondria. (Stephen Archer)

How COVID-19 damages lungs: The virus attacks mitochondria, continuing an ancient battle that began in the primordial soup

COVID-19 causes lung injury and lowers oxygen levels in patients because the SARS-CoV-2 virus attacks cells’ mitochondria. This attack is a throwback to a primitive war between viruses and bacteria.

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