How can the spread of pathogens be reduced by immunizing a large proportion of the population?
How can the spread of pathogens be reduced by immunizing a large proportion of the population?

How can the spread of pathogens be reduced by immunizing a large proportion of the population?
How does vaccination help prevent illness in an individual?
Even with modern synthesis, how might a chemical extracted from a plant be used in developing new drugs?
How are most new drugs synthesised in the pharmaceutical industry?
How was penicillin discovered, and who discovered it?
From which plant does the painkiller aspirin originate?
Where does the heart drug digitalis originate from?
How were drugs traditionally extracted from plants and microorganisms?
What is the role of preclinical and clinical testing in drug development?
What is the process of discovery and development of potential new medicines?