I don't understand how you believe in opening up and not in herd immunity. They go hand in hand. If you open up this summer, herd immunity is the end of this. People will "social distance" to a degree. But if restaurants and gyms open up, it's a free for all again. Just like we had in Feb/March in the US. That explains the uptick in deaths that are showing up in a few articles.
IE:
https://www.businessinsider.com/air-conditioning-spread-coronavirus-restaurant-can-service-industry-open-again-2020-4