Medical research

Researchers find no evidence that sperm counts are dropping

The widely held view that sperm counts in men are dropping around the world may be wrong, according to a new study by University of Manchester, Queen's University in Kingston, Canada and Cryos International, Denmark.

Immunology

How COVID-19 'breakthrough' infections alter your immune cells

New research from scientists at La Jolla Institute for Immunology (LJI) suggests people who received COVID-19 vaccines and then experienced "breakthrough" infections are especially well armed against future SARS-CoV-2 infections.

Diseases, Conditions, Syndromes

From infection to chronic illness: Learning from long COVID

Since the COVID-19 pandemic, SARS-CoV-2 has caused unexplained, chronic, post-infection symptoms in survivors. The phenomenon, known as post-acute sequelae of SARS-CoV-2 infection or "long COVID," surfaced shortly after COVID-19 ...

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