I did not follow this vaccine topic so this may have been covered already. I do not have the time to do a deep dive.

https://www.midwesterndoctor.com/p/the-century-of-evidence-vaccines

The Century of Evidence Vaccines Cause Sudden Infant Death Syndrome
Unmasking one of the greatest tragedies in medicine
A Midwestern Doctor
May 22, 2025

Story at a Glance:

•Since at least 1933, the medical community has known that vaccines cause infant deaths. To conceal this, those deaths were renamed "crib death" and then "Sudden Infant Death Syndrome" (SIDS), eventually being attributed to infants not sleeping on their backs.

•This revisionism is not supported by the existing evidence nor the historical changes in the frequency of SIDS. Most recently, SIDS rates have had an unprecedented decrease in tandem with the COVID-19 lockdowns reducing vaccination rates.

•The vaccine most strongly associated with SIDS, DPT, was protected for decades by the government despite knowing a large body of evidence around the world showed it killed infants—particularly when an inevitable hot lot was released. Eventually, so many injury lawsuits were filed that in 1986, the government had to give blanket immunity to the vaccine manufacturers.

•This article will concisely review the vast body of evidence showing vaccines cause SIDS and reveal the mechanism modern research has now repeatedly proven causes vaccines to trigger infant death.
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The incidence of Sudden Infant Death Syndrome has grown from .55 per 1000 live births in 1953 to 12.8 per 1000 in 1992 in Olmstead County, Minnesota. The peak incidence for SIDS is at age 2 to 4 months, the exact time most vaccines are being given to children. 85 % of cases of SIDS occur in the first 6 months of infancy. The increase in SIDS as a percentage of total infant deaths has risen from 2.5 per 1000 in 1953 to 17.9 per 1000 in 1992. This rise in SIDS deaths has occurred during a period when nearly every childhood disease was declining due to improved sanitation and medical progress except SIDS. These deaths from SIDS did increase during a period when the number of vaccines given to a child was steadily rising to 36 per child.
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Note: it has always astounded me that the medical profession knows SIDS peaks at exactly 2, 4, and 6 months of age, but cannot connect that to childhood vaccines being given at the exact same time.
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Note: Obomsawin also highlighted that when Japan moved the DPT injections from 3-5 months to 24 months of age, there was an 85-90% reduction in DPT brain damage and SIDS cases, and a 60% decrease in the overall infant mortality rate.
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•Simultaneous identical twin deaths are an extraordinarily rare event and are hence considered a gold standard for establishing causality, and in 1946, two twins died (on their backs) within 24 hours of their second DPT vaccine— something also shown in 1987, 2006, 2007, 2010, and 2013 case reports.

•Researchers like Dr. William Torch (who analyzed 72 sequential SIDS cases and then over 200) showed that these deaths clustered shortly after vaccination—something which could not be explained by chance.
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DPT was associated with 5-fold higher mortality than being unvaccinated [DTwP increased deaths 3.93 times in boys and 9.98 times in girls]. No prospective study has shown beneficial survival effects of DPT.
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A judge then forced GSK to release their confidential safety data which showed 90% of reported infant deaths occurred immediately following vaccination (again strongly suggesting an association).1,2

•A later confidential 2015 report GSK gave to European regulators showed almost 52.5% of vaccine-linked deaths occurred within 3 days of vaccination, 82.2% within seven days, and 97.9% within ten days.1,2
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Since that time, the total infant death rate remained relatively unchanged, until in 2020 something extraordinary happened—the lockdowns led to America's first significant drop in vaccination as well-child (vaccination) visits were "non-essential." At the time, many in the vaccine safety community predicted this would lead to an unprecedented drop in SIDS rates.

Vaccination rates indeed dropped, and in tandem, deaths did as well: