These are people who were perfectly healthy two or three days before, and then two days later, they can no longer breathe, and this polio virus has paralyzed not only their arms and their legs, but also their breathing muscles.
Ce sont des gens qui étaient parfaitement sains deux ou trois jours auparavant, puis deux jours plus tard, ils ne peuvent plus respirer, et ce virus les a paralysés, non seulement des bras et des jambes, mais aussi des muscles respiratoires.