There is not yet any evidence that a vaccine using shark extracts will be successful. We might be killed tens of thousands of sharks and more for a notion tha

There is not yet any evidence that a vaccine using shark extracts will be successful. We might be killed tens of thousands of sharks and more for a notion that it may be beneficial and in the end we killed them all for no reason. Neither of the two vaccines that are being used on a large space now contain it.