"The flu sends more kids to hospital than any other preventable disease. Children need to be vaccinated against flu if they have a health problem or are likely to come into close contact with anyone who has a health problem. The government provides free flu shots for people considered at high risk of complications from flu." Source:www.abc.net.au

(a) Describe the private benefits and external benefits of vaccinations and explain why a private market would under provide vaccinations. Draw a graph to illustrate a private market for vaccinations and show the deadweight loss.

(b) Explain how government intervention could achieve an efficient quantity of vaccinations and draw a graph to illustrate this outcome.