Is it ethical to travel right now? Experts on flying in the age of Delta

Questions to consider before you inflict the moral injury' of a risky, nonessential trip

A new season is here and, with it, seedlings of holiday escape plans to some sun-drenched beach or snowy mountain ski slope. In view of passenger data from the US and the UK, air travel is on its way toward recovering from the slump of a pre-vaccine Covid-19 pandemic - despite the rise of the Delta variant.

But does that mean it's a good idea to buy that plane ticket, even if you're vaccinated? And if you're comfortable assuming some degree of personal risk, is it unethical to do so?