A slim majority (52%) of Americans say the drug should be made legal, compared with 45% who want it to be illegal. Opinions have changed drastically since 1969, when Gallup first asked the question and found that just 12% favored legalizing marijuana use. Much of the change in opinion has occurred over the past few years — support rose 11 points between 2010 and 2013 (although it has remained unchanged in the past year). Separately, 76% in our February survey said people convicted of minor possession should not serve time in jail.

Ebola virus disease (EVD), formerly known as Ebola haemorrhagic fever, is a severe, often fatal illness in humans. The virus is transmitted to people from wild animals and spreads in the human population through human-to-human transmission. The average EVD case fatality rate is around 50%. Case fatality rates have varied from 25% to 90% in past outbreaks. The first EVD outbreaks occurred in remote villages in Central Africa, near tropical rainforests, but the most recent outbreak in west Africa has involved major urban as well as rural areas. Community engagement is key to successfully controlling outbreaks. Good outbreak control relies on applying a package of interventions, namely case management, surveillance and contact tracing, a good laboratory service, safe burials and social mobilisation. Early supportive care with rehydration, symptomatic treatment improves survival. There is as yet no licensed treatment proven to neutralise the virus but a range of blood, immunological and drug therapies are under development. There are currently no licensed Ebola vaccines but 2 potential candidates are undergoing evaluation.