The Aporia · Kennedy’s vaccine plan could cause surge in hepatitis B, study finds

A study published on October 20 found that Robert F. Kennedy Jr.’s proposed change to hepatitis B vaccination policy could lead to a significant increase in chronic infections among young Americans. Currently, newborns receive the first dose of the vaccine within hours of birth, but Kennedy's recommendations would delay this until two months or later based on parental decision-making. The study, led by Dr. Amir Mohareb, predicts that delaying vaccinations until two months could raise chronic hepatitis B cases by 19% among those reaching age 20, while a shared decision-making approach could increase infections by 83%. These changes would render more than half of newborns susceptible to the virus during adulthood.

Written locally by qwen2.5:14b on 2026-10-20, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Story summary

A new study published on October 20 by researchers from Harvard Medical School and Massachusetts General Hospital finds that Health Secretary Robert F. Kennedy Jr.’s plan to change hepatitis B vaccination policies for newborns could lead to a significant increase in chronic infections. The study, led by infectious diseases physician Amir Mohareb, models the impact of delaying the first dose of the vaccine until two months after birth instead of administering it within 24 hours of birth. This shift would increase chronic hepatitis B infections among individuals by age 20 from an average of 255 cases per year to 303 cases, marking a 19% rise. The research indicates that this policy change could put more than half of Americans at risk for the disease, which can cause severe health issues like cirrhosis and liver cancer.

Written for “Kennedy's Vaccine Plan” on 2026-10-20, grounded in this article and the 0 other(s) covering the same event.

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Kennedy’s vaccine plan could cause surge in hepatitis B, study finds

left frames Kennedy's proposal negatively
Ending the practice of immunising all newborns against hepatitis B, as Health Secretary Robert F. Kennedy Jr has recommended, would sharply increase the number of chronic infections and put more than half of Americans at risk of the disease by age 20

left criticizes Kennedy's recommendation for increasing health risks
But in December 2025, a panel of advisers chosen by Kennedy recommended that parents should decide whether, or when, infants should get the shot if they were born to mothers who test negative for hepatitis B

left implies Kennedy's advisory panel is controversial

Reading Leans left (beta estimate) Confidence high

Leaning: leans left for article 92221 (high confidence, 3 verified quotes) · logged 2026-10-20

📰 Kennedy's Vaccine Plan

Health · 1 article(s) covering the same event.

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The Straits Times

2035 article(s) here · 1 carrying a prediction

🔮 Kennedy’s vaccine plan could cause surge in hepatitis B, study finds Apoorva Mandavilli

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Kennedy’s vaccine plan could cause surge in hepatitis B, study finds Apoorva Mandavilli uncertain

Mandavilli → cause → B

Ending the practice of immunising all newborns against hepatitis B, as Health Secretary Robert F. Kennedy Jr has recommended, would sharply increase the number of chronic infections and put more than half of Americans at risk of the disease by age 20, according to a new study published on Oct 20. uncertain

Jr → end → Oct

Hepatitis B is a highly contagious virus that can lead to cirrhosis, liver failure and liver cancer. asserted

that → lead → cirrhosis

To prevent infections, doctors in the United States have for decades administered the first dose of the hepatitis B vaccine to all babies within 24 hours of birth – and within 12 hours to infants whose mother is known to be infected. asserted

mother → prevent → infants

But in December 2025, a panel of advisers chosen by Kennedy recommended that parents should decide whether, or when, infants should get the shot if they were born to mothers who test negative for hepatitis B. asserted

who → choose → mothers

In those cases, the group said, parents should decide “no earlier than 2 months of age”. asserted

parents → say → age

Kennedy and his associates have argued that hepatitis B is primarily a sexually transmitted disease and that babies do not need the protection unless their mothers are infected. asserted

mothers → argue → protection

But the virus can be spread by people who do not know they have it, as well as by household objects used by an infected person. asserted

they → spread → person

In January, Kennedy proposed a new childhood vaccination schedule in which the vaccine would be offered under a shared clinical decision-making approach – that is, after consultation with a healthcare provider. asserted

that → propose → provider

In March, a federal judge temporarily blocked the implementation of the December and January recommendations. asserted

judge → block → recommendations

But the lawsuit continues. asserted

lawsuit → continue → ?

Amir Mohareb, an infectious diseases physician at Massachusetts General Hospital and Harvard Medical School who led the study, and his colleagues modelled the potential impact of changing hepatitis B vaccination policy on the estimated 3.6 million infants born in a single year. Immunising babies at two months of age rather than at birth would increase chronic hepatitis B infections acquired by age 20 by 19%, from an average of 255 cases per year to 303, the study found. asserted

study → lead → 303

Switching to a shared decision-making policy would increase chronic infections by 83%, to an average of 467 cases, and would result in more than 50% of children born each year entering adulthood susceptible to infection. asserted

Switching → switch → infection

The findings were published in the journal Annals of Internal Medicine. asserted

findings → publish → Medicine

The Department of Health and Human Services did not provide comment. asserted

Department → provide → comment

Kennedy’s vaccine plan could cause surge in hepatitis B, study finds

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