@Tim To infection? Yes, possibly migrants, or any one in a low-income, low-social status, situation, like everywhere (EDIT: and the ignorant/stupid). The most vulnerable, as in in risk of dying, are the elderly and sick, regardless of who they are.
@Tim The government has no power to order a full-blown lock-down, as far as I understand. The current strategy here relies on people following guidelines. It might well change in the coming weeks.