“…However, recall bias cannot be ruled out, since questionnaires were completed up to 120 days after discharge, and for those who died, patients’ relatives provided the data. In fact, in a small-scale cohort study of 200 patients hospitalised with moderate-to-severe COVID-19 in Brazil, PA over the past 12 months was not associated with length of stay or any other clinical outcome 8. This does not mean that PA is futile in preventing severe cases of COVID-19, but that its benefits may vary across stages of the disease.…”