In mild to moderate cases of coronavirus, a loss of smell and taste is one of the early signs of Covid-19. Here's an easy way to determine if your sniffer and taste buds are working-- The Jelly Bean Test. You take a jellybean in one hand, and with the other hand hold your nose tightly. You put the jellybean in your mouth and chew it. Let's say it's a fruit flavor jellybean: if you get the sweetness of the jellybean you'll know your taste is working. Then, while still chewing, suddenly release your nose. If you have a sense of smell you will suddenly get the odors and say "Oh, that's a lemon jellybean, that's strawberry, etc". It's a very quick and dramatic response. This is probably a good indication that your sense of smell and taste are in pretty good shape. (SOURCE: Center for Smell and Taste at the University of Florida 4/5/20)