15 basic technologies could help reduce exposure

1. In lifts (elevators if you’re a Yank), or indeed any room that gets a lot of people traffic and may therefore spread infections, a simple passive infrared detector could monitor whether there are people in it, and if not, a strong UV light could be activated, which would help kill any viruses and bacteria present.
2. Portable UV sterilisation boxes could reduce contamination on face masks in between uses so that it’s clean again before you go back out there
3. Tethered drones equipped with strong (and directional) UV lights could continuously sterilise surfaces in some key areas. Untethered drones that can rapidly recharge could also help.
4. High powered air filters that can remove viruses could be installed in train carriages, hospital wards and corridors etc.
5. Industrial and domestic smoke and particulate scrubbers could be adapted to reduce the concentration of  airborne viruses in any area with high concentrations of people. Systems that use plasma or static electricity also exist.
6. In corridors, either of these air cleaning mechanisms could be used alongside blowing the air in a vortex to maintain a narrow channel of purified air, so that limited filtering can still maintain a safe corridor.conjuction with high pressure
7. Voluntary ‘digital air’ subscription could enable ‘cookies’ or markers to be collected by your mobile phone as you walk around. If other subscribers that have been in contaminated areas are nearby, your phone could alert you so you can stay clear.
8. Just as we already have pollen and pollution forecasts, virus detectors could produce real-time information on areas to avoid, or that are safe to visit for exercise.
9. Bongs (bottles that pass the air through a liquid) could be adapted to use rapid anti-viral fluids). Ultrasonic transducers could further continuously mist the anti-viral medium so that a large air volume is exposed to allow longer decontamination periods with a small amount of fluid.
10. Spiky net face-masks (like an orange bag with soft spikes on each junction) could prevent people touching their faces.
11. People could voluntarily wear ‘smart bindis’ made from thermal colour-changing materials similar to those used in cheap fish tank thermometers. You could tell at a glance if someone has a fever or not.
12. Face masks and surface covers could be made from fabrics that contain nanospikes, attached to pizoelectric vibration devices that can send ultrasonic waves through the materials, physically rupturing virus and bacteria.
13. Piezoelectric misting could also be used to make forehead mist generators that occasionally bathe the face in anti-viral mist
14. People living nearby should be able to combine online orders to maximise logistics efficiency
15. Gloves with antiviral insides that sterilise hands when worn. Obvious alternative is to sterilise inside and outside.