[4r4r4r]

Oncogenic viruses on the surface make their way into the blood stream upon skin penetration. Normally you can digest them if you eat them because they denature in the acidic environment of the stomach.

Molecular mechanisms of viral oncogenesis in humans:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6336458/

Poisons such as Oleandrin, which is a toxic cardiac glycoside found in the poisonous plant, oleander (Nerium oleander L.), interferes in some essential processes within the cell, the most important of these being the inhibition of the Na-K ATPase. This protein enables the cell to exchange the cations Na+ and K+ between the intercellular and extracellular spaces by which, for instance, electric signaling is made possible in nerve cells. Oleandrin binds to specific amino acids in the protein, causing it to lose its function. After depolarization of the cell in which Na+ flows into the cell, the Na+ cannot be transported back into the extracellular membrane, causing the sodium gradient to disappear.

[goatlover]

Sounds like a really long and uncertain way to assassinate someone.