They keep saying 2021 for a vaccine so people don't get too over-enthusiastic and start to get careless. The Russians intend to start mass inoculations of their vaccine in October. The Mexican government is talking about the Oxford vaccine in October. I suspect they will be rolled out first in countries where the regulatory procedure is not as tight. In countries where you work or you die, taking a chance on an unproven vaccine does not seem like much of a risk. If a 30,000 person trial works out well, I won't have much hesitation. The older you are the greater the benefit/risk ratio. In the meantime take 2000 IU of vitamin D3 a day, the evidence is mounting it helps survival chances, and it wont do any harm.