Health

Study: Brain Reward Training May Boost Vaccine Antibody Response

Can positive thinking truly boost vaccine response, or is it mainly emotional comfort with little effect on immunity?

Published JAN 20

Study: Brain Reward Training May Boost Vaccine Antibody Response

Story

Above: A man receives a Pfizer COVID-19 vaccination in Culver City, U.S. on Sept. 23, 2025. Image credit: Allen J. Schaben/Los Angeles Times/Getty Images

The Facts

A randomized controlled trial involving 85 participants, published Monday in Nature Medicine, examined whether training people to activate brain reward pathways could influence immune response to the hepatitis B vaccine. Participants were divided into three groups: reward mesolimbic upregulation, non-mesolimbic control upregulation and no neurofeedback control.
Nature
Researchers used fMRI neurofeedback to train participants to increase activity in the ventral tegmental area (VTA) through self-chosen mental strategies, such as imagining future trips or recalling pleasant experiences. Participants received real-time feedback on their brain activity over four training sessions.
The i Paper
The Times (UK)
Greater ventral tegmental area upregulation was associated with larger post-vaccination increases in hepatitis B antibody levels, with a correlation of r = 0.31 and P = 0.018. However, post-vaccination antibody levels did not differ significantly between the three experimental groups.
ScienceAlert
Nature
Sustained VTA upregulation was linked to mental strategies involving positive expectations rather than general happiness or pleasure.
Scientific American
Independent
The study measured only antibody levels and was not designed to test clinical efficacy of the vaccine. No adverse effects were reported to have occurred during the trial, and researchers emphasized the approach is intended as a complementary tool, not a replacement for vaccines or standard medical care.
guardian
Medicalxpress
Daily Mirror

Sources Split

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The Spin

Narrative A

Training the brain's reward system through positive thinking demonstrably strengthens immune response to vaccines. Scientists proved people who learned to activate their ventral tegmental area produced significantly more antibodies after hepatitis B vaccination than others. This groundbreaking research opens pathways for harnessing mental strategies like the placebo effect to complement medical treatments and boost immunity.

Dr David Barzilai on X

guardian

New Atlas

Narrative B

The study involved just 85 participants with weak correlation and should not be mistaken for proof that thoughts meaningfully alter immunity. Placebo effects are real but limited, working mainly on brain-modulated symptoms such as pain, stress or fatigue. They do not cure disease, lower cholesterol or reliably produce measurable immune enhancement.

Rajeev Jayadevan on X