Whats the deal with the coronavirus?

K

Ok. So before I get hate, yes I do wear a mask in public, wash my hands regularly, social distance, do everything I am supposed to do etc. Also, i am genuinely asking this because I don't get it, not because I am trying to prove a point or anything.

So I am in the US. Coronavirus cases have been spiking in parts of the US again, although not in my area. Recently I have read articles that the infection rate of the Coronavirus may have been up to 13x higher than originally thought based on the results they have been getting on the antibody tests. These results have been portrayed as a bad thing but wouldn't that be a good thing? Doesn't that mean that more people have the antibodies to the virus and won't get infected if they come in contact with a sick person again. Also doesn't that mean that the mortality rate is way lower than we originally thought? And if that is the case, how is this worse than the flu and why can't we open things up and get the economy going again?