Professor Valerie Beral discusses the latest findings of the million women study. An estimated 1000 extra women in the UK have died from ovarian cancer between 1991 and 2005 because they were using Hormone Replacement Therapy.

Dr Grace Smith from the Health Protection Agency West Midlands Public Health Laboratory in Birmingham, UK, discusses the research article in this week's issue showing how Bovine tuberculosis could spread by human-to-human contact.

Dr Erika Sims from the University of East Anglia, UK, discusses the research article in this week's issue showing how newborn screening for cystic fibrosis is justifiable in economic terms, building on previous evidence showing the clinical value of newborn screening.

Tom Reilly from Liverpool John Moores University, UK, discusses the seminar about jet lag in this week's issue. He explains why jet lag is usually worse when travelling east, and suggests practical measures for air travellers to help reduce the effects of jet lag after long-haul flights.

March 24 is World Tuberculosis Day; in this week's podcast Dermot Maher from WHO and the STOP TB partnership detail the latest progress in global TB control efforts.

Professor Gordon Ewy from the University of Arizona discusses the results of international research concerning bystander resuscitation which highlight how chest compression alone is more effective than conventional CPR.

Nick Banatvala from the UK Department of Health discusses how a new UK strategy can help drive forward international work on global-health initiatives.

Professor Bart Fauser discusses the randomised trial highlighting how a mild treatment strategy for in vitro fertilisation (IVF) can reduce multiple births and lower costs compared with conventional IVF treatment.

Til Barnighausen from the Africa Centre for Health and Population Studies discusses the implications from two randomised trials published this week showing how circumcision can halve HIV transmission in heterosexual men.

Faith McLellan interviews former US President Jimmy Carter in Ethiopia and learns about the Carter Center outreach programmes for river blindness and malaria.