
The Centers for Disease Control and Prevention (CDC) has been accused of hiding data and study results on multiple occasions. One notable accusation during the COVID-19 pandemic claimed that the CDC withheld data showing the ineffectiveness of COVID-19 vaccines as early as January 2021. Additionally, the CDC has been criticized for its handling of studies investigating the link between vaccines and neurodevelopmental disorders, such as autism. In the past, the CDC has been accused of omitting data, manipulating statistical results, and failing to obtain legally required ethics permissions. These accusations have led to a loss of trust in the CDC and other health agencies, particularly regarding their COVID-19 response and recommendations.
| Characteristics | Values |
|---|---|
| CDC Hiding Results of Vaccine Studies | COVID-19 vaccines failing as early as January 2021, according to The Epoch Times |
| Data Withheld | Effectiveness of booster shots on 18-49-year-olds, hospitalizations, booster vaccines, and wastewater analyses |
| Reason for Withholding Data | Data is "not yet ready for prime time" and may be "misinterpreted" by the public |
| CDC Response | The data does not support an association between COVID-19 vaccination and cardiac death in young healthy persons |
| CDC Study Limitations | Possible misclassification, selection, and confounding bias |
| Other Claims | The CDC covered up damage caused by thimerosal in vaccines, according to Dr. Boyd Haley |
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What You'll Learn

CDC withheld COVID-19 vaccine data
The COVID-19 pandemic has brought to light several instances of the CDC allegedly withholding critical data on vaccine studies. This has led to a significant loss of trust in the agency, which is meant to be a reliable source of information during public health emergencies.
One notable example is the CDC's alleged withholding of data on hospitalizations and vaccine effectiveness, particularly in the 18-49 age group. While the CDC has collected data on COVID-19 hospitalizations, breaking it down by age, race, and vaccination status, it has not made most of this information public. This data is crucial as it could help state and local health officials better target their efforts to control the virus. The CDC's reluctance to release the data has been attributed to concerns about misinterpretation and the desire to fit certain talking points.
In another instance, the CDC was accused of mishandling vaccine data. Sen. Ron Johnson requested an investigation into a CDC official, Dr. Tom Shimabukuro, who monitors COVID-19 vaccine adverse events. There were allegations that Dr. Shimabukuro may have deleted or destroyed agency records, obstructing oversight efforts and violating record preservation demands.
Furthermore, the CDC has been criticized for its focus on comparing risks between vaccinated and unvaccinated adults, rather than providing detailed information on hospitalized patients stratified by age, sex, race, and vaccination status. This has led to accusations of presenting data that fits a specific narrative while withholding information that might show a different picture.
The withholding of data by the CDC has been a cause for concern and has sparked debates about data transparency during public health crises. It has also fueled accusations of cover-ups and raised questions about the effectiveness of COVID-19 vaccines.
While there are valid reasons for the CDC to be cautious in releasing data, such as preventing misinterpretation, the lack of transparency has had significant repercussions and contributed to a decline in trust in public health agencies.
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Humetrix study results
The Humetrix study in question was conducted under contract with the US Department of Defense Joint Artificial Intelligence Center (DoD JAIC). Humetrix, a company that develops mobile apps for healthcare and emergency purposes, was asked to analyse Medicare claim data to monitor, map and conduct Covid-19 predictive analytics for the military. The data belonged to the US Department of Defense.
Humetrix found that among the beneficiaries, there had been 133,000 cases, 27,000 hospitalizations, and 8,300 intensive care admissions among the fully vaccinated since the start of the COVID-19 pandemic. Dr Francis Collins, the director of the U.S. National Institutes of Health at the time, wrote in an email that the results of the study provided “pretty compelling evidence that VE is falling 5–6 months post-vaccination for both infection and hospitalization for those over 65”. He added that “even for those 3–4 months out there is a trend toward worsening VE”.
The CDC, FDA, and National Institutes of Health did not share the data with the public as they considered whether to clear and recommend COVID-19 vaccine boosters. The CDC spokesperson, Kristen Nordlund, said that the data was not released because it was “not yet ready for prime time”, and that there was a fear that the public would “misinterpret” the information.
The withholding of data by the CDC, FDA, and other health agencies has led to a loss of trust in these institutions. People involved in withholding information from the public should be held accountable, and opposition leaders in Washington and throughout the country must act on this issue.
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CDC's COVID-19 response
The CDC's response to COVID-19 has been a multifaceted approach, involving various measures to curb the spread of the virus, assist local health departments, and provide resources for the public.
One of the key roles of the CDC during the pandemic has been to support state, tribal, local, and territorial health departments in their COVID-19 response efforts. From January 21 to July 25, 2020, the CDC deployed 208 teams to assist 55 health departments across the country. These teams helped investigate transmission in high-risk settings such as long-term care facilities, food processing plants, correctional facilities, and homeless shelters. They also collaborated with health departments to strengthen local capacity, address health equity issues, and provide outbreak response support.
Additionally, the CDC developed resources and tools to aid in the COVID-19 response. They created the "PPE Burn Rate Calculator", a spreadsheet-based model to help healthcare facilities optimize the use of personal protective equipment (PPE). The CDC also launched the SARS-CoV-2 Sequencing for Public Health Emergency Response, Epidemiology, and Surveillance (SPHERES), a national network providing real-time genomic sequencing data to public health response teams. This allowed them to track the evolution of the SARS-CoV-2 virus.
The CDC also worked with Apple, Inc. to release an app with a COVID-19 symptom and exposure questionnaire. The app provided information on how to isolate, monitor symptoms, and offered guidance on testing and when to contact a medical provider.
However, the CDC has also faced criticism and controversy during its COVID-19 response. There have been accusations that the CDC withheld data from the public, particularly regarding the effectiveness of vaccines and boosters. For instance, the CDC allegedly withheld data showing an increase in COVID-19 cases among vaccinated seniors in 2021, which was acquired by U.S. health agencies but not presented publicly. In another instance, the CDC spokesperson, Kristen Nordlund, stated that certain data was not released because it was "not yet ready for prime time" and that they didn't want the public to "misinterpret" the information. These actions have led to a loss of trust in the CDC and the Biden administration's COVID-19 response.
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CDC vaccine safety research
The US Centers for Disease Control and Prevention (CDC) has been accused of hiding data and failing to be transparent with the public about COVID-19 vaccines. In 2021, the CDC, along with the FDA and National Institutes of Health, did not share data about COVID-19 cases, hospitalizations, and intensive care admissions among the fully vaccinated. The CDC spokesperson, Kristen Nordlund, stated that the data was not released because it was "not yet ready for prime time" and that there were concerns about the public "misinterpreting" the information. This has led to a loss of trust in the CDC and other agencies.
In addition, there have been allegations of flaws and falsifications in CDC vaccine safety research. One example is the work of David Geier and his father, who were accused of conducting unauthorized analyses of health records to hunt for a link between vaccines and autism, risking patient confidentiality. Their work has been criticized by other researchers as sloppy and containing fundamental statistical errors.
Furthermore, there have been claims that the CDC covered up evidence of neurological risks associated with the vaccine preservative thimerosal. A paper published in 2025 alleged that the CDC had knowledge of these risks but continued to promote vaccines containing thimerosal. The paper also raised concerns about potential conflicts of interest and research bias within the CDC.
Despite these allegations, the CDC has continued to conduct vaccine safety research and address public concerns. For example, the CDC investigated the potential link between COVID-19 vaccines and cardiac arrest in young people, concluding that there was no association between the two. The CDC also regularly publishes studies on the effectiveness of coronavirus vaccines in preventing breakthrough infections and reducing disease severity.
While there have been accusations of the CDC hiding vaccine data and producing flawed research, it is important to consider the complexity of vaccine safety research and the potential impact of misinformation. The CDC, as a public health agency, has a responsibility to ensure that any data released is accurate and contextualized to avoid causing unnecessary panic or confusion.
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CDC's neurological risks cover-up
The COVID-19 pandemic has brought to light several instances of the CDC allegedly hiding data on the failing COVID-19 vaccines. In one instance, the CDC, along with the FDA and the National Institutes of Health, did not share data with the public on the waning effectiveness of COVID-19 vaccines, even as they considered recommending booster shots. This data, which was shared with the CDC by Humetrix Cloud Services, showed that there had been 133,000 cases, 27,000 hospitalizations, and 8,300 intensive care admissions among the fully vaccinated since the start of the pandemic.
The CDC has also been accused of withholding data on the effectiveness of booster shots for individuals between the ages of 18 and 49, hospitalizations, booster vaccines, and wastewater analyses. A CDC spokesperson, Kristen Nordlund, stated that the data was not ready for release and that there were fears that the public would "misinterpret" the information. These actions have led to a loss of trust in the CDC and other government agencies.
In addition to the allegations surrounding COVID-19 vaccine data, there have also been claims of the CDC covering up the neurological risks associated with thimerosal, a vaccine preservative. A paper published in June 2025 presented evidence that the CDC has had knowledge of the preservative's neurological risks but has continued to conceal them. The paper also raised concerns about potential conflicts of interest or research bias, as the CDC has a central mission of vaccine promotion.
Furthermore, there have been criticisms of the CDC's handling of vaccine safety studies, with some alleging that the studies are flawed and falsified. One example involves the Geiers, who were granted access to millions of anonymized health records to conduct a safety study of the DTaP vaccine. However, the CDC revoked their access after discovering that they were conducting unauthorized analyses to search for a link between the vaccine and autism, potentially breaching patients' confidentiality.
While some sources claim that the CDC has hidden or manipulated data on vaccine safety, there is also evidence to the contrary. For instance, the CDC has conducted studies to address concerns about a link between the COVID-19 vaccine and cardiac arrest in young people. The results of these studies, which analyzed death certificates and vaccination records, showed no association between the COVID-19 vaccination and sudden cardiac death in healthy young individuals.
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Frequently asked questions
The CDC has been accused of withholding COVID-19 data from the public. The CDC spokesperson, Kristen Nordlund, stated that the data was not ready for release and that there were fears that the public would misinterpret the information.
Yes, the CDC did not release data about the effectiveness of booster shots in people aged 18-49.
Yes, the CDC did not release data about hospitalizations, booster vaccines, and wastewater analyses.
There are claims that the CDC withheld information about vaccine safety for pregnant women, but there is no evidence to support these claims. The CDC has projected that COVID infections are growing or likely growing in most states, and the vaccines are safe for pregnant women.
Yes, the CDC has been accused of failing to obtain legally required ethics permissions, omitting data, and manipulating statistical results to deny any relationship between vaccines and neurodevelopmental disorders. There have also been allegations of research fraud and malfeasance within the CDC.











































