Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.

The end of the biggest World Cup ever is almost here. Following 100 matches, there are just four teams left and two more games to play. The tournament has been hosted by three countries: Mexico, ...

WASHINGTON — During his first term, President Donald Trump had a bold suggestion: He could, by executive order, limit the long-understood right to citizenship at birth. Subscribe to read this story ad ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Western intelligence agencies are warning that the threat AI poses to ...

The push to investigate what the president’s allies saw as a “deep state” cabal intent on taking him down set off cascading crises, ended careers and undercut the department’s credibility with judges.

A study led by researchers at the Centro Nacional de Investigaciones Cardiovasculares (CNIC) has identified a mitochondrial "checkpoint" that enables dendritic cells to efficiently activate T ...

Creativity and curiosity have always been central to the work of Joshua Moreau, Ph.D., an immunologist whose work at Oregon Health & Science University sits at the intersection of harnessing the ...

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In all patients, results of a platelet factor 4 (PF4)–induced platelet-activation (PIPA) assay were strongly positive, and serum from all the patients tested strongly positive against PF4 alone in a ...

Supported by a Yale School of Medicine Teams Award and grants from the Colton Center for Autoimmunity at Yale to M.E.R. and J.S.P., and to E.S. and R.A.F. R.A.F. is also supported by HHMI and E.S. is ...

Intraepithelial lymphocytes (IELs) constitute the largest lymphocyte population in the body and exhibit direct cytotoxic effector functions. Despite their abundance and importance in mucosal immunity, ...