Student health and health questionnaire (editorial revision)

Why can't we drink raw water? What do you have to do to read and write? What's the good of eye-care? Questionnaire 1 on health knowledge and behaviour of primary school students. () the main measures to prevent influenza in the showers are: (a) a, b, mosquito c, cockroach d, fly: (a) b, x, x, b, x, b, x, c, c, c, c, c, b, b, b, b, b, b, b, b, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, questionnaire on health knowledge and behaviour in primary school