Early diagnosis and prompt treatment is encouraged at which level of prevention?

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E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) pp. 32-34, 34-36
E6 Medicine Harrison 22e Part 1 p. 49-51
Practise the full DSSSB - 28 August 2019 (Shift-1)
Attempt every question from this paper in a timed mock, then review the full solution for each one.