MeSH tree: D20.215.894.899.085
The average human has about 1.8 trillion immune cells. These cells patrol the body for bacteria, viruses, cancers, and other threats. Vaccines enhance this security system by teaching our immune cells to target specific pathogens. ...
Apr 14, 2026
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We're keeping an eye on new influenza and SARS-CoV-2 viral variants. Here's what we know about those viruses—and your immune system's ability to fight back.
Apr 13, 2026
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Booster vaccines reduced the risk of COVID‑19-related hospitalization and death, according to a new study of over 3 million adults who had the autumn 2022 vaccine in England. The research, led by the universities of Bristol ...
Feb 18, 2026
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Two major medical groups will begin reviewing vaccine safety and effectiveness after major changes at the U.S. Centers for Disease Control and Prevention (CDC) have raised alarms among experts.
Feb 12, 2026
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Six days after a senior FDA official sent a sweeping internal email claiming that COVID vaccines had caused the deaths of "at least 10 children," 12 former FDA commissioners released an extraordinary warning in the Dec. 3 ...
Dec 22, 2025
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While life expectancy across the U.S. declined significantly during the COVID-19 pandemic, a new study led by researchers at the University of Hawaiʻi Thompson School of Social Work & Public Health and the Hawaiʻi State Department ...
Dec 15, 2025
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The Food and Drug Administration's COVID-19 vaccine approval issued Aug. 27 comes with restrictions on who's eligible to receive the vaccine. Meanwhile, the administration has endorsed seasonal influenza vaccines—but only ...
Aug 29, 2025
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For 30 years, vaccine recommendations from the Centers for Disease Control and Prevention have aligned closely with those from the American Academy of Pediatrics, or AAP. But on Aug. 19, 2025, the AAP published new vaccine ...
Aug 21, 2025
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Lymph nodes are a key part of the human immune system, whose primary function is to combat infections. The effectiveness of vaccines is based on their ability to trigger events in lymph nodes that lead to the development ...
Aug 18, 2025
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Moderna's COVID-19 vaccine has received full approval from the U.S. Food and Drug Administration (FDA) for use in children with medical conditions that put them at higher risk of severe illness.
Jul 11, 2025
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