You can do some amazing things with chicken eggs. According to Slow Food, you can use egg whites for leather cleaner and glue, egg yolks as hair conditioner, and eggshells for pest repellants, fabric whitener, and as a pan cleaner. While this common ingredient can serve a variety of household functions, science has taken the potential of chicken eggs one step further. According to La Prensa Latina, scientists and experts at Brazil's Butantan laboratory now need 20 million chicken eggs in order to develop the country's very own COVID-19 vaccine. The lab, which currently manufactures China's Sinovac vaccine for Brazil, now needs millions of chicken eggs in order to start producing their own medication, which should potentially yield 40 million doses.