Diseases, Conditions, Syndromes

Five things to know about bird flu

As a new virus takes center stage at the heart of a global outbreak, it's easy to get flashbacks of March 2020.

Immunology

How the immune system learns from harmless particles

Our lungs are bombarded by all manner of different particles every single day. While some are perfectly safe for us, others—known as pathogens—have the potential to make us ill. The immune system trains its response whenever ...

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