I'll direct my question to Professor Lee.
Professor, I completely agree with your comment that this is unsustainable. We're only five weeks into this lockdown and billions and billions of dollars have been spent. It's tough to imagine another month or two months.
You cited a few jurisdictions, including Germany and Denmark, in your presentation. Perhaps you could elaborate a bit about what they are doing.
You also spoke about a vaccine. I've heard some people say that unless we have a vaccine, we need to continue with essentially an effective lockdown. In the case of SARS, it's been 17 years and there is no vaccine.
One of the concerns I have as we try to find an off-ramp to this, all the while being guided by public health officials, is that the goal posts are shifting from the objective of this effective shutdown, which is to flatten the curve and ensure that our hospital system isn't overwhelmed. I wonder if you share that concern.