This is why Covid hurts the elderly more

WE SAY that it is as if the door of the house was not locked, and not even ajar. It is as if it were open. For Covid, age, with the damage that aging brings with it, have that effect. Thus the virus, especially during the first and second waves, facilitated by the lack of a vaccine that could close that double-acting door, entered the organism of many elderly people undisturbed, and often left tangible marks.