Evidence is building about the impact of air pollution on health, but the relationship between the cocktail of chemicals, gases and particles in the air we breathe and the direct effect on an individual's health is a tricky one to prove. Dr Farrah Jarral cycles to Kings College London to hear about a new study by researcher in respiratory toxicology, Dr Ian Mudway, which revealed, to the surprise of Ian and his colleagues, that particles from brake dust had the same damaging impact on our lung immune system as that familiar culprit, diesel exhaust. It's a result that demonstrates that the toxic risk to our health doesn't just come out of the exhaust pipe and suggests the concept of a zero emissions vehicle might need further work. COPD or Chronic Obstructive Pulmonary Disease is an umbrella term for a range of respiratory conditions that used to be known by names like emphysema or chronic bronchitis. COPD flare ups or exacerbations are the second largest cause of emergency hospital admissions in the UK. Dr Jennifer Quint, consultant physician in respiratory medicine at the Royal Brompton Hospital tells Dr Farrah Jarral about a world-first study where the individual air pollution exposure of COPD patients was tracked in real time to find out how toxic air can make their condition worse. What's it like for healthcare professionals working on the front line of infectious disease outbreaks? Dr Michael Kiuber, a consultant in emergency medicine at University Hospital Southampton NHS Foundation Trust, volunteered to treat patients with the deadly infection, Ebola, in Sierra Leone and he describes the challenges to Farrah of caring for very sick adults and children while taking every safety step to avoid contracting the Ebola virus himself. And Inside Health regular contributor, Dr Margaret McCartney outlines the challenges for the NHS in planning how to protect staff as the UK grapples with the global outbreak of Covid-19. There's a growing trade in female cosmetic genital surgery including hymenoplasty, which claims to the restore the hymen to its virginal state. Scores of private clinics in the UK are offering the procedure with advertising claims like "Get your virginity back!" and "Restore your innocence within one hour!". Dr Leila Frodsham, consultant gynaecologist, specialist in psychosexual medicine and spokesperson for the Royal College of Obstetricians and Gynaecologists discusses the ethics of the procedure. Producer: Fiona Hill