Just one in eight of the population are aged 16 to 24 years old, yet this age group accounts for 65 per cent of all cases of chlamydia, 55 per cent of all cases of genital warts and 50 per cent of all cases of gonorrhoea. The agency, in its latest publication on sexually transmitted infections and young people, is advising that all sexually active young people are screened for chlamydia annually and every time they change...