MMI public health questions on vaccines, liberty and community health

MMI public health questions ask you to weigh a benefit spread across many people against a cost that lands on one. The questions in this topic put that trade in a kitchen, a care home and a family dinner as well as a legislature, and expect you to argue both sides before you choose.

What these questions test

Public health is the organized effort to protect the health of a whole population rather than one patient at a time. Interviewers test whether you can make the strongest case for each side of a measure before you take one. Supporters of a sugar tax point to lower consumption, and critics point out that it falls hardest on low-income families. Supporters of a helmet law point to the injuries it prevents, and critics point out that fewer people may cycle at all.

Interviewers also listen for proportionality, the principle that a limit on liberty should be no greater than the health goal needs. The scenarios test whether you can apply the same reasoning to one person. A cook who was vomiting last night and a brother with a fever flying in to see an immunocompromised grandmother each put one person's wish against other people's safety. Raters score the decision and the conversation, because a rule enforced with contempt is a rule people evade.

How to approach them

1. Name the health benefit and who receives it, then the freedom restricted and who bears it. A measure that protects people who cannot protect themselves carries more weight than one that protects people from their own choices.
2. Ask whether the restriction is proportionate: whether evidence shows it works, whether a lighter measure would do and whether it is time-limited.
3. Name the groups who pay more than others under the measure, and say whether it can be adjusted for them.
4. Take a position and say what evidence would change it. Laws on vaccination, helmets and tobacco differ between countries, provinces and states, so argue from principle and evidence rather than from one place's rules.
5. For a scenario with a person in front of you, decide what you'd do, then say how you'd tell them, with the reason and an alternative.
6. An MMI prompt may tell you to discuss both sides, and its follow-ups change a fact to test whether your position survives. A panel asks one direct question and expects a position within two minutes.

Common mistakes

• Picking a side in your first sentence and never naming its cost reads as a slogan rather than an argument.
• Treating freedom as a complete argument, without saying what the person loses, gives the rater no cost to weigh.
• Deciding a scenario on loyalty to the person in front of you forgets the people the rule protects.
• Giving a patient what they ask for to keep them happy fails the station, and lecturing them fails it a different way.