I am 70 and have chronic heart failure that is stabilized. I walk 4 miles every day and am very fit. Yes people over a certain age (65) are more susceptible to more severe symptoms and death but so are those under 70 who are obese, hypertensive, diabetic or immune compromised. This Has not been well thought out as there will be quite a few older cruisers who cannot meet this criteria and therefore, their cruising days are over with RCCL and some other cruise lines.