鲨鱼的癌症发病率没有那么低

人类一生大致是20%，美国人比较高，一生接近40%，
在自然界被发现的鲨鱼，癌症发病率 < 0.01%，注意这不是一生的发病率，一生的癌症发病率比这个还要高很多。

 

AI的总结：

Summary Comparison

Species	Estimated Lifetime Cancer Risk	Notes
Humans (U.S.)	~40%	Common in old age; rising with lifespan
Sharks	Likely <1%, possibly <0.1%	Cancer rare but confirmed in several species
Other Fish	0.1–1%	Varies by species and environment (pollution increases rates)