Corona Virus is a Family of viruses (Family>Genus>Species) this is a Novel=New strain. So you can think of it as a new wild dog breed that if it bites you you can die. Are you even going to see that dog today 99.9% no, if you do see that dog is it going to bite you 40% Chance and if it does bite you are you going to die 5% Chance. The first number 99.9% decreases (bad for you) every day as the dog breeds with exponential spread. To understand exponents give your kid a penny then every minute double it so 1,2,4,8,16,32 so after 5 minutes they have 63 cents. Do that for 1 hour and see how much money they have. The second number 40% goes down (good for you) with social distancing but goes up if you go to big gatherings. The third number 5% goes down (good for you) if you are healthy and young but goes up if you or old or unhealthy. 20% of the US population is old and 40% is unhealthy and that isn’t even including the fatties.