Theres no doubt, with vivid 19, zero contact = zero transmission.
It's the future, so embrace it. I know we all wish and hope that in some way we're not in the 'higher risk of death' group, but the reality is that we're on this forum for a reason and compromised cardiology plus any other comorbidities we're lumbered with, dictate that we should socially isolate now and for the forseable future.
Of course its excruciatingly inconvenient, scary and stressful, but it really is the only option. The more that accept and diligently practice a hermit -like lifestyle , the quicker we get over this and the fewer the losses.
There's really no time left for indecision. To quote the strap line from a global sportswear brand 'Just do it'. Social isolation (and diligent handwashing) could save your life or someone dear to you. It will certainly reduce your risk significantly.
Stay safe.