evidence: A Coronavirus Vaccine Could Kill Half A Million Sharks, Conservationists Warn A conservation group is warning that the development of an effective coronavirus vaccine on a global scale could ravage shark populations worldwide, as researchers race to produce a vaccine using an oil derived from sharks. [...] Shark Allies, a nonprofit that advocates for the protection of sharks, projects that some 500,000 sharks could be killed if a coronavirus vaccine with shark squalene proves to be effective. Already, an estimated 2.7 million sharks are killed annually for their squalene to make cosmetics, according to the group.