In reality I wouldn't wish to travel by air until a vaccine that works has been developed and has been supplied to the 7 billion people in the world, or at least to the majority of those in the country I was visiting.
Three big "ifs" in that sentence. Firstly a vaccine that works may never be developed (no SARS vaccine yet after 16 years). Secondly there will never be a time when all 7 billion people are vaccinated, or develop immunity to the virus. Thirdly the country I'm visiting may well not want a visitor from the hotbed of C-19 in Europe.
I'm an old man now and I guess I might just live on memories of travels past rather than travel now. Just as I live on my memories of playing cricket and football, and of.... ahem.... intimacy. Covid-19 may introduce a self imposed age barrier to air travel; over 65 perhaps......