This is one of many alternatives to lockdowns and vaccines that reduces virus transmission:
See this draft design.
How much will this reduce virus transmission?
Can we keep shops and restaurants open that use such a device even during a lockdown?
Would this make sense in elderly homes, too?
E.g. in the dining hall?
Feel free to let yourself be inspired by this draft to design, to manufacture and to sell a device if you have a business that is capable to do so.
The draft drawing is under Creative Commons Attribution-ShareAlike 4.0 International License.