Thai health officials confirm two cases of microcephaly, a severe birth defect in babies linked to the Zika virus, the first in South East Asia.
Ethical questions around a new gene editing technology need to be considered now - even though its use may be some way off, experts say.
A 10th of children have a "monkey-like" immune system that stops them developing Aids, researchers say.
Why some fear it could mean a world without Down's syndrome
Do we need to get away from other people to feel truly rested?
The Afghan who now treats his countrymen via Skype
Is it possible to eradicate all diseases?
Does glucosamine really help joint pain?
Is India facing a viral epidemic across the country?
Why did a High Court judge back a widow's bid to prevent frozen embryos from being destroyed?