what is epidemiology?

what does epidemiology require?

what is quite often the issue when data shows a correlation?

how many cases of lung cancer does smoking cause and what causes the risk to increase?

what are other factors that can cause lung cancer besides smoking?

why is it common to only detect lung cancer tumours when they are quite large?

what is a tumour?

what is metastasis?

what does benign mean?

what does malignant mean?

what are symptons of lung cancer? (4)

what is emphysema?

what is the result of emphysema?

what is emphysema linked to?

what are phagocytes?

what do phagocytes normally produce to breakdown proteins in pathogens

what chemical does the body normally produce that stops the elastase hurting the host/ body's cells and what does it do?

what is the cause of emphysema?

what is tuberculosis caused by?

what does tuberculosis do?

Tuberculosis is easily spread, how does this happen? (4)

what is the issue with asthma?

how many people may get emphysema?

how do inhalers help sufferers of asthma?

what is copd?

what happens with copd?

where is copd more common?

how is copd tested?