COVID and Flu May Activate Breast Cancer Cells in Lungs

COVID and Flu May Activate Breast Cancer Cells in Lungs

Aug 20, 2025

People with a history of breast cancer may want to consider COVID and flu vaccinations, according to the researchers. Read more…

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  • cowgirl13
    cowgirl13 Posts: 821

    Until this comes out in a medical journal or at an ASCO, I question these findings.

  • threetree
    threetree Posts: 2,566

    I think there might be something to it, but I agree that more solid evidence and support for this idea is definitely warranted before official acceptance.

    I did read some kind of research study that was done a couple of years into the Covid thing (a university study, but I have no citation), that suggested "long Covid" at least, could "alter the tumor microenvironment" in such a way that it created more favorable conditions for breast cancer cells to do their thing. I consider this much different from saying that Covid or the vaccine "causes cancer"

    I'm especially interested in this subject because I had Covid in May of '22, then lingered over the summer (long Covid?), and then progressed the following November, being diagnosed with now stage 4, the following January of '23.

    Similarly, I had shingles last May, again lingered over the summer, and began to show progression (after 2.5 years of stability) last November. That progression has led to my having to start a new drug ( 2nd line of treatment) this month, i.e. in January.

    I can't help note the similar patterns that occurred with these two viral infections. Again, I don't believe that the viruses, vaccines, or anti-virals cause cancer, but I am very open to the idea that when we get certain viruses, having to deal with them may well create more favorable conditions for tumors to grow and progress. Maybe it's just from a weakened immune system, but maybe something else? I think this issue is really worth studying.

  • cowgirl13
    cowgirl13 Posts: 821

    Well said, thank you.

  • piglinetch
    piglinetch Posts: 1
    edited March 6

    @moto x3m I can totally relate to the concern about flu and COVID potentially affecting breast cancer cells. After my treatment, I was paranoid about every sniffle! Have any of you noticed changes in how your body responds to illness post-diagnosis?

  • anjou7
    anjou7 Posts: 7

    Yes, Nature is widely considered a top-tier, premier multidisciplinary scientific journal. It holds one of the highest impact factors in the world (42.778 in 2019, ~54.5 for 5-year average) and features extremely high, selective standards. It is consistently ranked as a premier, high-impact, and prestigious publication for original research. 

    image-2c246f0c6ec72-6d2d.png

    Google Scholar +5Key details about Nature as a top-tier journal:

    • Prestige & Visibility: It is ranked among the most prestigious, influential, and highly cited journals globally.
    • High Selection Standards: Competition for publication is severe, with a very low acceptance rate.
    • Impact: ResearchGate users consider Nature to have high impact, often surpassing its peers like Science or PNAS in various fields.
    • SCImago +8 image-d4026b95a099c8-4546.png