This is really a cost-benefit analysis only you can make. Nobody knows for sure how bad the second wave will be, where it will be, or if it will even happen. Assuming the VA would even let you back in, is additional research something you need for your app? Are there other parts of your app you could be looking at working on that have a lower risk for yourself and your family? Without knowing where you are in the journey (undergrad year/gap year) spending the summer to study and ensure that your next mcat retake results in a stronger score is a perfectly legitimate use of your time, especially considering the current difficulties in finding EC opportunities.
I'm hoping to reapplying next cycle. I have about 100 hours of research in the same lab and about 200 each of clinical/nonclinical hours, and about 30 hours shadowing. I don't think getting more shadowing/clinical hours is a good idea right now or if it's even possible. There's generally a lot of people I have to interact with in the nonclinical volunteer activity I was involved in so I'm hesitant to start doing that again.