Cow belt aphids can be thought of as basically extinct, and the risk is zero.
Because the infection of cattle with aphids is like this: cattle eat grass with eggs, eggs in the cow body developed into tailings, survive in beef, people eat beef with tails, tails in the human body developed into adult insects and spawned with human feces excreted.
At present, however, cattle in China, and most of the world’s countries, have little chance of eating human waste. After all, there are very few people in the wild. And the loss of human this ultimate host, cattle belt aphids can not be infected between cattle and cattle, tailings in the body of cattle survival time is also limited, even if the cattle infected with aphids, within a year will self-healing, tailing death. So we can see that as long as there is a year completely no one infected with cattle tapeworms, it is equivalent to completely cut off its transmission chain, let it extinct. And Chinese hospitals haven’t met a cow belt aphid patients for many, many years. By the way, there is imported beef to say, imported meat is frozen, tailings will be frozen to death, so imported meat is safe.