Older people like President Trump are at more risk from COVID-19 because of how the immune system ages

Older coronavirus patients face grimmer outlooks. A virologist explains the aging-related changes in how immune systems work that are to blame.

Brian Geiss, Associate Professor of Microbiology, Immunology & Pathology, Colorado State University • conversation
Oct. 2, 2020 • ~7 min

Declining antibodies and immunity to COVID-19 – why the worry?

If antibody levels drop dramatically after an infection, what does that mean for immunity? An expert explains how B and T cells contribute to immunity and why antibodies don't tell the full story.

Alexander (Sasha) Poltorak, Professor of Immunology, Tufts University • conversation
Aug. 26, 2020 • ~7 min

A man was reinfected with coronavirus after recovery – what does this mean for immunity?

Reports describe a Hong Kong man who was reinfected with the coronavirus after returning from Europe. Does that mean he wasn't immune after the first infection?

Megan Culler Freeman, Pediatric Infectious Diseases Fellow, University of Pittsburgh • conversation
Aug. 25, 2020 • ~5 min

Older people are at more risk from COVID-19 because of how the immune system ages

Different demographics are more or less vulnerable to serious complications from the coronavirus. A virologist explains the aging-related changes in how immune systems work that are to blame.

Brian Geiss, Associate Professor of Microbiology, Immunology & Pathology, Colorado State University • conversation
March 19, 2020 • ~7 min

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