Cuba has successfully eliminated mother-to-child transmission of both HIV and syphilis, the World Health Organization says.
Liberia's authorities quarantine the area where a 17-year-old boy died of Ebola - the first reported case in the country in seven weeks.
California governor Jerry Brown has signed a bill that imposes one of the strictest school vaccination laws in the US.
The UK scientists who've found out how to trap the tsetse fly
Can you teach people to have empathy?
Australia reviews its organ donation scheme
EU-US food disputes delay a key trade deal
Is immunotherapy the cure we've been waiting for?
When dentures were made from dead people's teeth
Chad is a potent symbol of what work is still needed to eradicate extreme poverty and hunger - the first of the eight Millennium Development Goals.