Yes / no, is the following a verifiable fact?
"Cyanobacteria spreads through the human population quickly and is known to tint the skin blue."
Chain of thought and solution for this question is:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Cyanobacteria is an algae that infects people through exposure in bodies of water.
So, the answer is no.