The family had planned a December trip to Tokyo (8 nights). We are bringing our two kids, 5 and 7 for this. Everything is booked, including tickets but my wife is having second thoughts due to potential health issues as we have young kids. Is there any legitimate concerns that I should suck it up and cancel the trip (6 nights at Sheraton Grande, Disney Hotel and 2 nights at Hilton Narita Airport) as well as Delta air tickets. If there is no known concerns, can anyone help suggest what I can do to allay her fears? My sis-in-law ever since hearing the plans had started sending articles my wife's way which triggered the reactive worrying.