Legalising the medical use of cannabis has not led to a surge in the numbers of adolescents using it in the USA, according to new research that surprised its authors and will encourage those hoping for relaxation of the law elsewhere.
Data on one million teenagers shows marijuana use did not increase in US states where it was legalised, with fall among youngest children, authors of study find
A major study published in one of the world’s leading medical journals has concluded that there is no link between the MMR (measles, mumps and rubella) vaccination and autism in children.
A woman in Oxford has become the first British volunteer to be injected with an experimental Ebola vaccine, which, if it works, will be fast-tracked for use in west Africa.
Big business and financial investors, not consumers, will force better conditions in the world's textile factories, according to the head of an investment firm aiming to pump $500m (£306m) into creating a more ethical garment industry.
