An important time node, the emergence of inflection point, will have an impact on health policy formulation, disease control programs, and even the daily life of the public. An inflection point is a mathematical term that refers to a point that changes the upward or downward direction of a curve. Intuitively speaking, the inflection point is the point where the tangent intersects the curve (that is, the concave-convex boundary point of the curve). The inflection point of epidemic situation refers to the place where the epidemic situation is controlled and begins to change in a good direction. The decline in the number of suspected infections and the decline in the number of cases are the signs of turning points.

An important time node, the emergence of inflection point, will have an impact on health policy formulation, disease control programs, and even the daily life of the public.

An inflection point is a mathematical term that refers to a point that changes the upward or downward direction of a curve. Intuitively speaking, the inflection point is the point where the tangent intersects the curve (that is, the concave-convex boundary point of the curve). The inflection point of epidemic situation refers to the place where the epidemic situation is controlled and begins to change in a good direction. The decline in the number of suspected infections and the decline in the number of cases are the signs of turning points.