It will be included soon in all the flight tickets .
Mainly it’s so the supposed overseas infected countries don’t infect Asia . China I think has a certain percent positive on the flight landing in China , that airline loses flights into China .
So 500,000 bth and you can't get in . Sounds a pretty useless investment . If its at the whims with no real entitlements you can count on in the tough times . Which is when you need it .