Afterpay Valuation, page-821

Yea they can track down that unknown case. But it could take 2 weeks to figure out that that 1 case has infected god knows how many people (The average infection rate is 5 people). And good luck tracking them down. Even if you do, they've had 2 weeks to infect others. Chasing this virus is not too indifferent to a dog chasing his tail. This is scary and for those people on hotcopper who try and downplay it are literally people sticking their head in the sand. The second biggest decline of the DOW since it's inception (including the biggest one day decline ever) tells you the market is taking this very seriously.