I don't see how we can be back to 70% back by next summer. This was not an economic or financial crisis, this was a medical crisis. It requires a medical solution to fix. There's only two ways out of this, either we get an effective vaccine or herd immunity. A possible third way might be this just goes away on its own like some of the less-serious viruses in the past. Despite the name operation warp speed most experts agree it will be at least 12-18 months to a vaccine. Even assuming best case scenario and by next May a vaccine comes, it will still take a long time to get 330 mil people vaccinated.
China is about to put 100 million on lockdown with a second wave of the virus. Being that we are about 4 months behind China, that would imply we should expect a second wave here around Fall in the 3rd quarter. Then what?