An alleged side effect of the Covid-19 vaccine(s).
Turbocancer (allegedly) causes vaccinated individuals to have a very high risk of developing extremely aggressive cancers, which metastasize extremely quickly to the point that they're basically untreatable.
Whether or not TurboCancer is real is heavily disputed and controversial. While most sources claim that it's false, conspiracy theorists state that these sources may be biased. The fact that some vaccinated individuals HAVE in fact suddenly died from cancer does not help the matter, as it cannot be determined whether or not it just happened or if they really are correct.
Funny Cancer is a large group of diseases that can start in almost any organ or tissue of the body when abnormal cells grow uncontrollably, go beyond their usual boundaries to invade adjoining parts of the body and/or spread to other organs - but funny