… the external parts of the human body (skin, hair, nails, lips, or external genital organs) or with the teeth and the mucous membranes of the oral cavity (e.g. … prevent the action of, or otherwise exert a controlling effect on any harmful organism by means other than mere physical or mechanical action. An article treated … substance is released from the article to the outside in order to control harmful organisms. A frequently mentioned example is a mosquito net treated with an insect …

… the consultations and the exchange of information and knowledge, a  symposium  was organised where stakeholders met with other experts to deepen their knowledge of … the consultations and the exchange of information and knowledge, a  symposium  was organised where stakeholders met with other experts to deepen their knowledge of …