The swiftest way for it to be over would be to let it run rampant and people either get it and survive or get it and die, with thousands of daily deaths in this country alone.
Unfortunately the supression measures whilst saving lots of lives oveall will make it last longer.
Bit like opening a bottle of fizzy pop that's been shaken up, do you let the gas out all at once or only let a little out and put the cap back on?