Cases appear to be rising rapidly again. If deaths start increasing dramatically again too, how we will be able to contain things again, as surely another national lockdown is not feasible? Also since it's looking like there is long term damage in a high number of cases, there could end up being a lot of people with ongoing, possibly permanent physical issues.
I am optimistic about a vaccine, but I am starting to worry it might not arrive quickly enough to prevent a large scale disaster as things spiral out of control again.