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In the General/Chat forum, on a thread titled RFK Jr. warns: "In a million years, I would not take the flu shot .... People who take the flu shot are protected against that strain of flu, but they are 4.4 times more likely to get a non-flu infection.", DugwayDuke wrote:
Question: are those who take the flu shot more susceptible to other infections”
AI Says No.
Based on current medical evidence as of December 2025, there is no consistent evidence that taking a flu shot makes you more susceptible to other infections.
While a small number of individual studies have explored a phenomenon called viral interference, the broader scientific consensus remains that the flu vaccine does not increase the risk of other respiratory illnesses.
Key Scientific Findings
- Lack of Viral Interference: Most large-scale studies have found no significant association between flu vaccination and increased risk of non-flu respiratory viruses, such as seasonal coronaviruses or RSV.
-Temporary Immunity Explanation: A single 2012 study suggested a higher risk of other infections, theorizing that because vaccinated people avoid the flu, they miss out on a few weeks of “temporary non-specific immunity” triggered by a natural flu infection. However, subsequent research has largely failed to replicate these results.
- Protection Against Other Risks: Large-scale meta-analyses show that flu vaccination is actually associated with a reduced risk of other complications, including an 18% reduction in general respiratory diseases and a significant reduction in pneumonia.
- No Cross-Susceptibility to COVID-19: Multiple studies, including systematic reviews through 2024 and 2025, have confirmed that flu vaccination does not increase the risk of contracting or suffering severe outcomes from COVID-19.
Common Reasons People May Feel “Sicker”
- It is common for people to mistakenly believe they are more susceptible after a shot due to several factors:
The Two-Week Window: It takes about two weeks for the vaccine to build full immunity. If you are exposed to a virus during this time, you can still get sick.
- Other Viruses: The flu shot only protects against specific influenza strains. It does not prevent the “common cold” or other respiratory viruses that circulate at the same time.
Normal Immune Response: Mild side effects like muscle aches or a low-grade fever are signs the body is building protection, not signs of a new infection.
Question: “What research supports the viral interference hypothesis and flu shots?”
- Research into the viral interference hypothesis and flu shots is largely centered on a small number of studies that show mixed or conflicting results. While most major public health studies as of late 2025 find no link between the flu vaccine and increased susceptibility to other viruses, a few specific studies are frequently cited as supporting this hypothesis.
Key Studies Supporting Viral Interference
The 2012 Cowling Study: This randomized controlled trial in Hong Kong followed 115 children and found that those who received the trivalent inactivated influenza vaccine (TIV) had a 4.4-fold higher risk of confirmed non-influenza respiratory infections. The researchers hypothesized that by preventing natural flu, the vaccine also prevents the temporary “non-specific immunity” (likely interferon-based) that a natural infection would provide against other viruses.
- The 2020 Wolff Study (DoD Personnel): A study of Department of Defense personnel during the 2017–2018 season found no overall evidence of increased risk for all non-flu viruses combined. However, it did find a statistically significant association between flu vaccination and an increased risk of seasonal coronaviruses (OR = 1.36) and human metapneumovirus (OR = 1.51).
Historical and Theoretical Research: The concept was first described in the 1960s, showing that oral enterovirus vaccines could sometimes decrease the detection of unrelated respiratory viruses, suggesting one virus can “interfere” with another. Modern theories suggest this occurs through competition for cellular receptors or the induction of inhibitory host proteins like interferon.
Context and Contradicting Evidence
- It is important to note that the majority of recent research contradicts these specific findings:
RSV and Parainfluenza: In the same 2020 Wolff study that showed an increased risk for coronaviruses, vaccinated individuals actually showed significant protection against RSV and parainfluenza.
Large-Scale Replications: A three-year U.S. study involving over 10,000 patients from 2010–2013 found no evidence of virus interference or any increased risk of other respiratory infections following flu vaccination.
2025 Health Assessments: Recent peer-reviewed evidence from late 2025 continues to support the overall safety and effectiveness of the seasonal flu shot, alongside COVID-19 and RSV immunizations.
I always rely upon you to provide fake news. Your links are from FAKE NEWS ERA medical establishment. The 2025 Health Assessments claim is vague and relies on un-named 'Recent Peer Reviewd Evidence' just like all the peer-reviewed evidence supporting the Covid 'vaccine' and the ones declaring ivermectin useless and or dangerous.
The same AI will no doubt declare the Covid 'vaccine' safe and effective, because the CDC and Medical establishment banked years worth of fake research to say so. It's not hard to find fake news touting the flu vaccine. One must expend effort to find the truth.
RFJ Jr. cites a Pentagon study: Influenza vaccination and respiratory virus interference among Department of Defense personnel during the 2017-2018 influenza season