I have been fascinated by the life and evolution of butterflies. This could be your Covid story. LOL Monarch Butterflies
Once hatched from their eggs the caterpillars live for 7 - 17 days with one goal - EAT to grow bigger. Caterpillars eat milkweed that contains a toxin that makes them poisonous to protects them from predators, it stays in their systems so even the butterflies taste bad.
Once the caterpillar cocoons up into a chrysalis it takes 8 - 15 days before it changes