Cleaner 2020 Essential. We need a vaccine against these damn SARS-CoV. There are more than two million people infected, more than one hundred thirty-four thousand people died. The world is wobbly because of covid-19, they mutate into different types it’s hard to find vaccines as they evolve faster than humans, and humans take a long time to become higher animals. covid-19 took only a short time to evolve into many different types.