Response options: Do not know any symptoms, Respiratory symptoms, Respiratory + systemic symptom, Respiratory + systemic symptom + other local symptom, Respiratory + other local symptom, Other local symptom, Only systemic symptoms
Response options: SE:Inapplicable ; RU:Inappropriate response; Missing{Inappr, Not asked in survey, Not applicable, No answer, Don´t know, A lot worse off, 2, 3, 4, 5, 6, 7, 8, 9, A lot better off