Pfizer’s COVID-19 vaccine now has full FDA approval. What in the world does that mean? For one thing, it doesn’t change how it’s used for this coronavirus because the government already gave it the green light for that. However, it’s likely to change the rules around who must get the vaccine. Expect mandates to come fast and furiously. And if you want to know what kind of impact the vaccine can have on the population and your day-to-day life, just take a look at Iceland.