But what its also revealed is that we can do this. Lockdowns work, and people understand that. So, we all stay at home and wash our hands, and we'll beat this again, just like we did back in April. If we're lucky, it's a limited outbreak, it'll be tracked down and isolated, and this won't last too long. If it has spread further, then it will take longer.
As for what it means for the election, it depends on how serious the outbreak is. The dissolution of parliament has been delayed until Monday while the government works that out, but if its a limited outbreak, then things will proceed as normal - there's a bit of wiggle-room in the statutory timeline. Otherwise, Parliament expires in October, which would mean a November or December election. But obviously, if this goes on for any length of time, there are going to be limits on the ability of MPs to campaign in person and hold public meetings, which obviously isn't ideal. As for the voting itself, Andrew Geddis covers that here. We have a functioning government which has planned for this contingency, so our democracy will continue despite the virus.