Another potential solution would be to include fine particle filtration and intense UV light to filter and sterilize the air prior to it being recycled back into the passenger and crew compartments.
Yes, and that will be expensive modifications. That's why from what I heard another solution is to provide additional disposable filtering on present system. This also has to be changes every flight.
However perhaps this COVID 19, will provide industry to modified air circulation system in plane. At this moment seems many Airlines that I heard prefer to make mandatory for every passanger to use mask and reduce capacity for self distancing.
If any of them are being anal, again you have long queues, this time with cranky as well as tired people. So there is quite a lot to look at before air travel can become common place again.
Try to find video from South China Morning Herald, but so far forgot the link. That video shown filtering booth that being try out by Hong Kong International Airport. The booth provide temparature scan with UV filtering and seems some kind spray based on nano cleaning tech.
Well I forgot the tech detail, but point is I agree with you that the Airport also need to make changes.
Those changes by both Airport and Airlines however can be expensive, and I don't think most airlines and airports can afford some fancy changes.
This means either reducing passanger capacity thus traffic's, by regulations or prices.
However I doubt that can be done to the extend of Industry profitability. Even IATA doubt that.
Coronavirus travel bans means very few international flights are operating. Most long haul flights, even some domestic routes, are packed with passengers, meaning social distancing rules on the ground often disappear in the sky. This is the case on my 22-hour Sydney to Paris trip with Qatar Airways.
www.forbes.com
Good article on how Economics will still then play on Airlines filled up all the seats in Economy. Also in the end people will still be traveling despite the fear on infection.