celeste@kbin.earth 1 week ago
https://pmc.ncbi.nlm.nih.gov/articles/PMC5946918/ oh hey here's a study that goes into the cases when cancer has transferred.
In humans, a lot of things have to go wrong for transmission to happen.
Cancer cells have a parasitic propensity in the primary host but their capacity to transit between individuals is severely restrained by two factors: a lack of a route for viable cell transfer and immune recognition in allogeneic, secondary recipients. Several examples of transmissible animal cancers are now recognised. In humans, the only natural route for transmission is via the haemochorial placenta which is permissive for cell traffic. There are three special examples of this occurring in utero: maternal to foetus, intraplacental twin to twin leukaemias and choriocarcinoma-extra-embryonic cells to mother.
It can also happen in organ transplants, since the recipient has to be on immunosuppressants.
https://en.wikipedia.org/wiki/Clonally_transmissible_cancer
It doesn't seem like there are case studies about transferring the cancer cells through the air. People can also get diseases that can lead to cancer from each other, but that's not the same thing.
cbthunderhead@lemmy.cafe 1 week ago
And yet, the Southam experiments proved that if someone is injected with cancer cells of another person, they develop cancer, proving that cancer cells ending up in the body poses the danger of transmission, just like with a virus.
chewypoops@lemmy.world 1 week ago
Southam’s experiments never proved anything. They earned Southam multiple criminal convictions for experimenting on people without their consent. His victims already had cancer, because he experimented on cancer patients. Stop spreading medical disinformation.