Metro operator deploys cleaning robot to fight the coronavirus
https://www.railwaygazette.com/technology-data-and-business/metro-operator-deploys-cleaning-robot-to-fight-the-coronavirus/55995.article
Even when a kind of virus is not pandemic, MTR should pay attention to infection between passengers. That's because Hong Kong is one of the cities that have the highest population density around the world. It means virus can spread rapidly.
This cleaning machine should be on duty, even after the end of pandemic state of the current virus.