The Royal Society’s programme of public events includes a lecture on “The legacy of Jenner: vaccination past, present and future” on May 14 and 15, a discussion meeting on “Electronics with molecular materials: from synthesis to device” on June 4 and 5, and an exhibition entitled “New frontiers in science” on June 19 and 20. Details: Science promotion section, The Royal Society, 6 Carlton House Terrace, London SW1Y 5AG. Tel: 0171 839 5561 ext 25742575.