Parents and their offspring remain largely ignorant of the risks posed to health by STIs, such as Chlamydia.
A new report from Populus has found nearly 60,000 young people between the ages of 15 and 24, contracted Chlamydia in 2009.
Despite this, a third of parents, have not spoken to their offspring in this age group about sexual health.
Sex and relationship expert Dr Catherine Hood, said: "Despite knowing how common Chlamydia is, many young adults are worryingly indifferent to the potentially serious consequences of catching and leaving Chlamydia untreated.
"I’m urging parents to realise the risks of STIs and the benefits of testing, and talk to their children about it."
Dr Hood explained that Chlamydia is often known as a 'silent' infection as it regularly displays no symptoms but can lead to serious consequences including infertility and long-term pelvic pain.
The comments come after the launch of a new campaign urging young people to get tested for the disease.