For all new buildings or products, any surface which is touched by hundreds of people each day needs to be redesigned to be contactless or to use materials that minimize transmission; products like hand dryers should pass standards that measure whether they spread bacteria or viruses; buildings and public transportation (buses, trains and planes) need to use HEPA filters to reduce airborne transmission risks, and to filter out air pollution; and sinks for hand washing need to become a standard feature at office receptions or entrances/exits.
We should also be able to reduce the normally accepted steady state of deaths, ill health and economic impacts from flu and other unnecessary sickness.
But this is going to be more and more necessary as global disease transmission becomes easier. It could be a new strain of flu or a drug resistant TB next year. There has to be defence in depth and in advance, not just hoping always for a magic fix after the problem has occurred.