I prefer to call when I have questions but to use online chat is also helpful. I have already purchased goods on-line from other companies but was scared to buy drugs. Who knows what they can put in the parcel? When my package arrived I could not understand ...

“I take 20 mg Cialis pill and it works as expected but after sexual intercourse I sometimes feel muscle pain in the back and fatigue. I do not know if this is because I work like a stud or it is a side effect. Anyway I am lucky that I gave it a try.”

Experts are trying to find the best way to screen for prostate cancer, since blood tests alone are not accurate enough for most men.

STIs are particularly common among young people, with health experts saying testing for them is vital.

IAVI, Moderna and the University of Oxford are all working on new vaccines.

BBC Panorama has seen documents and spoken to former midwives from Nottingham University Hospitals NHS Trust.