An important ingredient for the covid 19 vaccine is the oil from the liver of a shark. Squalene is a natural organic compound, found in shark liver oil, which increases the effectiveness of a vaccine by creating a stronger immune response. Conservationists warn that depending upon the number of doses of the covid vaccine needed, upto 5 lakh sharks could be slaughtered and this would cause irreversible ecological damage. Not only sharks, but the ancient crustacean--the horseshoe crab may also bein danger as it is a key ingredient in vaccine development too. The blue blood of this animal gels very very quickly in the presence of toxins, it performs the same role in vaccine development by acting as a dependable testing system.

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