HIV destroys some white blood cells. A person with untreated HIV later develops tuberculosis.
Which statement explains this increased susceptibility?
HIV changes from a virus into the tuberculosis bacterium
HIV changes tuberculosis from a non-communicable to a communicable disease
fewer working white blood cells increase the spread of airborne droplets
fewer working white blood cells reduce defence against infection
43 exam-style questions on Edexcel GCSE Biology 5.1 Health and communicable disease, covering 5.1.1 Communicable and non-communicable diseases, 5.1.2 Disease susceptibility interactions, 5.1.3 Pathogens as disease-causing organisms, 5.1.4 Common infections, 5.1.5 Spread and prevention of pathogens, 5.1.6 Lifecycle of a virus, and 5.1.7 Spread and prevention of STIs. Each one has a worked solution and a mark scheme showing where the marks go.