When a person carrying coronavirus coughs or sneezes, they let out small liquid droplets from their nose, which might contain the virus. If you are too close you can breathe the droplets. To avoid this social distancing is being maintained throughout the world. W.H.O suggests at least 3-6 feet distance between yourself and anyone who is coughing or sneezing.
However, not only human beings but animals are also being spotted practicing social distancing these days.