Herd immunity doesn't seem to work with this virus. Some articles are saying people are catching it more than once(like cold or flu) which is seriously concerning.Like the spanish flu, I think this thing will cycle through for another year, until it vanishes/dies out which it seems to do when social distancing is done right.
Or when a vaccine is available. One of the reasons the stock market had a big up day yesterday and looks like another strong opening today is because of news about vaccines developments worldwide. There are more than 150 vaccines under testing now. In two weeks a 30,000 person vaccine trial begins which is the final step before making the vaccine available to the public. That process would normally mean a successful trial will make the vaccine available to the public by year end.